Consulta: subjectFacets:"C61"
Registros recuperados: 179
Data/hora: 06/06/2024 10:48:25

Buyback Programs: Goals, Objectives, and Industry Restructuring in Fisheries
Provedor de dados: 31
Autores: Kirkley,   James E.; Walden,   John B.; Waters,   James R.
National Oceanic and Atmospheric Administration Fisheries has conducted several buyback programs to reduce harvesting capacity in fisheries.  These programs have attempted to maximize capacity reduction given a fixed budget.  However, restructuring issues have not been considered.  We explore the possibility of satisfying three different buyback objective  We examine the black sea bass trap fishery and determine the number of vessels given different allowable catch levels and objectives of maximizing technical efficiency, capacity utilization, and vessels in the fishery.  We find considerable variation in the number of vessels allowed to remain in the fishery given the different objectives.
Tipo: Journal Article
Palavras-chave: Capacity utilization; Data Envelopment Analysis; Fishery buyback programs; Fishing capacity; C61; D24; Q22; Q28.
Ano: 2004
URL: http://purl.umn.edu/43422

A spatial bio-economic modelling approach on the trade-offs between global bioenergy demand, agricultural intensification, expansion, and trade
Provedor de dados: 31
Autores: Lotze-Campen,   Hermann; Popp,   Alexander; Beringer,   Tim; Muller,   Christoph; Lucht,   Wolfgang.
Increased future demands for food, fibre and fuels from biomass can only be met if the available land and water resources on a global scale are used and managed as efficiently as possible. The main routes for making the global agricultural system more productive are through intensification and technological change on currently used agricultural land, land expansion into currently non-agricultural areas, and international trade in agricultural commodities and processed goods. In order to analyse the trade-offs and synergies between these options, we present a global bio-economic modelling approach with a special focus on spatially explicit land and water constraints as well as technological change in agricultural production. For a given bioenergy demand...
Tipo: Conference Paper or Presentation
Palavras-chave: Land use change; Spatial modelling; Technological change; Environmental Economics and Policy; International Development; International Relations/Trade; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; C61; F15; Q24; Q25.
Ano: 2009
URL: http://purl.umn.edu/51458

The Ghost of Extinction: Preservation Values and Minimum Viable Population in Wildlife Models
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Eiswerth,   Mark E.
The inclusion of a minimum viable population in bioeconomic modeling creates at least two complications that are not resolved by using a modified logistic growth function. The first complication can be dealt with by choosing a different depensational growth function. The second complication relates to the inclusion of the in situ benefits of wildlife into the analysis. Knowledge about the magnitude of the in situ benefits provides no guide for policy about conservation management. Simply knowing that people are willing to pay a large amount each year to protect a species says nothing about whether one should manage habitat to protect or enhance the species’ numbers, unless the species is in imminent danger of extinction. If willingness to pay is to be a...
Tipo: Conference Paper or Presentation
Palavras-chave: Marginal willingness to pay; Endangered species and extinction; Minimum viable population; Resource /Energy Economics and Policy; Q20; Q24; C61.
Ano: 2007
URL: http://purl.umn.edu/9790

DISCOUNTING AND CLIMATE CHANGE POLICY
Provedor de dados: 31
Autores: Karp,   Larry S.; Tsur,   Yacov.
A constant social discount rate cannot reflect both a reasonable opportunity cost of public funds and an ethically defensible concern for generations in the distant future. We use a model of hyperbolic discounting that achieves both goals. We imbed this discounting model in a simple climate change model to calculate constant equivalent discount rates" and plausible levels of expenditure to control climate change. We compare these results to discounting assumptions and policy recommendations in the Stern Review on Climate Change.
Tipo: Working or Discussion Paper
Palavras-chave: Discounting; Climate change modeling; Stern Review; Markov Perfect Equilibria; Environmental Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2007
URL: http://purl.umn.edu/7149

INVESTMENT, CREDIT CONSTRAINTS AND PUBLIC POLICY IN A NEOCLASSICAL ADJUSTMENT COST FRAMEWORK
Provedor de dados: 31
Autores: Cechura,   Lukas.
This paper deals with the analysis of the impact of credit rationing on the farmer’s economic equilibrium and the analysis of different policy scenarios in a derived neoclassical adjustment cost framework. The theoretical model is an optimal dynamic investment model, in which the upper bound on investment is introduced. The limit of the investment enables to analyse the consequence of the occurrence of credit rationing on farmer’s capital accumulation, investment and supply. The method of optimal control is used to solve the optimization problem. The results show that the occurrence of credit rationing may significantly determine a farmer’s economic equilibrium. Then the analysis of defined policy scenarios suggests that a loan guarantee efficiently solves...
Tipo: Working or Discussion Paper
Palavras-chave: Credit constraint; Investment; Capital; SGAFF (Supporting and Guarantee Agricultural and Forestry Fund); Adjustment cost and farmer’s economic equilibrium; Kreditrationierung; Investitionen; Kapital; EAGFL (Europäische Ausrichtungsund Garantiefond für die Landwirtschaft); Dynamische Anpassungskosten und langfristiges Gleichgewicht.; Agribusiness; Agricultural Finance; Financial Economics; Institutional and Behavioral Economics; Political Economy; C61; Q12; Q14; Q18.
Ano: 2008
URL: http://purl.umn.edu/91954

Safe Minimum Standards in Dynamic Resource Problems -- Conditions for Living on the Edge of Risk
Provedor de dados: 31
Autores: Margolis,   Michael; Naevdal,   Eric.
Safe Minimum Standards (SMSs) have been advocated as a policy rule for environmental problems where uncertainty about risks and consequences are thought to be profound. This paper explores the rationale for such a policy within a dynamic framework and derives conditions for when SMSs can be summarily dismissed as a policy choice and for when SMSs can be defended as an optimal policy based on standard economic criteria. We have determined that these conditions can be checked with quite limited information about damages and risks. In order to analyze the SMSs in a dynamic setting, we have developed a method for solving optimal control problems where the state space is divided into risky and non-risky subsets.
Tipo: Working or Discussion Paper
Palavras-chave: Safe minimum standards; Optimal control; Critical zone; Threshold effects; Mixed risk spaces; Risk and Uncertainty; C61; Q20; Q30.
Ano: 2004
URL: http://purl.umn.edu/10568

Farm production costs estimation trough PMP Models: an application in three Italian Regions
Provedor de dados: 31
Autores: Arfini,   Filippo; Donati,   Michele; Marongiu,   Sonia; Cesaro,   Luca.
The objective of this paper is to present a Generalised Positive Mathematical Programming model suitable for the estimation of variable cost of production associated with different farm activities. This work present, discuss and demonstrates that the Generalised PMP model is a useful theoretical framework for the representation of farm choice, including for the description of costs related to the production function chosen by each entrepreneur. For this characteristics the model can be used for the farms belonging the FADN sample providing a powerful tools for researcher that would like to know variable costs of production for agricultural activities or estimate the impact of agricultural policy and market reform at regional and sectorial level. The main...
Tipo: Presentation
Palavras-chave: Variable cost of production; Positive mathematical programming; Farm accountancy data network; Production Economics; Q12; C61; Q18; C38.
Ano: 2012
URL: http://purl.umn.edu/124117

ACT Now or Later: The Economics of Malaria Resistance
Provedor de dados: 31
Autores: Laxminarayan,   Ramanan.
In the past, malaria control efforts in sub-Saharan Africa have relied on a combination of vector control and effective treatment using chloroquine. With increasing resistance to chloroquine, attention has now turned to alternative treatment strategies to replace this failing drug. Although there are strong theoretical arguments in favor of switching to more expensive artemisinin-based combination treatments (ACTs), the validity of these arguments in the face of financial constraints has not been previously analyzed. In this paper, we use a Bioeconomic model of malaria transmission and evolution of drug resistance to examine questions of optimal treatment strategy and coverage when drug resistance places an additional constraint on choices available to the...
Tipo: Working or Discussion Paper
Palavras-chave: Malaria; Mathematical models; Drug resistance; Bioeconomics; Health Economics and Policy; I10; I19; C61.
Ano: 2003
URL: http://purl.umn.edu/10699

Time perspective and climate change policy
Provedor de dados: 31
Autores: Karp,   Larry S.; Tsur,   Yacov.
The tendency to foreshorten time units as we peer further into the future provides an explanation for hyperbolic discounting at an intergenerational time scale. We study implications of hyperbolic discounting for climate change policy, when the probability of a climate-induced catastrophe depends on the stock of greenhouse gasses. We provide a positive analysis by characterizing the set of Markov perfect equilibria (MPE) of the intergenerational game amongst a succession of policymakers. Each policymaker reflects her generation’s preferences, including its hyperbolic discounting. For a binary action game, we compare the MPE set to a “restricted commitment” benchmark. We compare the associated “constant equivalent discount rates” and the willingness to pay...
Tipo: Working or Discussion Paper
Palavras-chave: Hyperbolic discounting; Markov Perfect Equilibria; Catastrophic climate change; Uncertainty; Environmental Economics and Policy; Resource /Energy Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2008
URL: http://purl.umn.edu/42848

CLIMATE POLICY WHEN THE DISTANT FUTURE MATTERS: CATASTROPHIC EVENTS WITH HYPERBOLIC DISCOUNTING
Provedor de dados: 31
Autores: Karp,   Larry S.; Tsur,   Yacov.
Low probability catastrophic climate change can have a signifcant influence on policy under hyperbolic discounting. We compare the set of Markov Perfect Equilibria (MPE) to the optimal policy under time-consistent commitment. For some initial levels of risk there are multiple MPE; these may involve either excessive or insufficient stabilization effort. These results imply that even if the free-rider problem amongst contemporaneous decision-makers were solved, there may remain a coordination problem amongst successive generations of decision-makers. A numerical example shows that under plausible conditions society should respond vigorously to the threat of climate change.
Tipo: Working or Discussion Paper
Palavras-chave: Abrupt climate change; Event uncertainty; Catastrophic risk; Hyperbolic discounting; Markov Perfect Equilibria; Environmental Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2007
URL: http://purl.umn.edu/7181

Nitrate Pollution Control Policy and Its Impact on Farms' Performance: A Nonparametric Approach
Provedor de dados: 31
Autores: Piot-Lepetit,   Isabelle; le Moing,   Monique.
The purpose of this paper is to develop models with an individual and a collective management of the European Nitrate directive. The objective is to compare productive efficiency of farms under the two regimes. First, we develop a model that explicitly integrate the individual constraint on organic manure spreading. The individual threshold is introduced as a productive right. Then, we develop a framework that allows for modelling exchange of productive rights among producers. The simulation of a management of the spreading constrainst on organic manure at the regional level give an estimate of the potential gains that can be realised by allowing a collective maagement of the European environmental regulation. Models are based on a nonparametric frontier...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental regulations; Manure management; Pig farming; Data Envelopment Analysis; Environmental Economics and Policy; C61; D21; Q12; Q52.
Ano: 2005
URL: http://purl.umn.edu/19458

RISK IN AGRICULTURE AS IMPEDIMENT TO RURAL LENDING - THE CASE OF NORTH-WESTERN KAZAKHSTAN
Provedor de dados: 31
Autores: Petrick,   Martin; Ditges,   C. Markus.
On the basis of portfolio selection theory, this paper finds that whole-farm risk must be regarded as a major reason for the low level of credit flow to agriculture in North-western Kazakhstan. A quadratic programming model was used in order (a) to demonstrate the comparatively high overall risk exposition of a typical farm, (b) to show that an inflow of working capital could contribute to risk reduction, and (c) to illustrate short-term risk management strategies. Although there may be a role for the government in reducing risk exposition of agriculture in its current form, natural and economic constraints suggest to pave the way for structural reforms that reduce the importance of agriculture in the rural economy. .
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural credit; Kazakhstan; Portfolio selection theory; Risk programming; Agricultural Finance; Q14; G11; C61.
Ano: 2000
URL: http://purl.umn.edu/14939

Controlling a Stock Pollutant with Endogenous Abatement Capital and Asymmetric Information
Provedor de dados: 31
Autores: Karp,   Larry S.; Zhang,   Jiangfeng.
Non-strategic firms with rational expectations make investment and emissions decisions. The investment rule depends on firms' beliefs about future emissions policies. We compare emissions taxes and quotas when the (strategic) regulator and (nonstrategic) firms have asymmetric information about abatement costs, and all agents use Markov Perfect decision rules. Emissions taxes create a secondary distortion at the investment stage, unless a particular condition holds; emissions quotas do not create a secondary distortion. We solve a linear-quadratic model calibrated to represent the problem of controlling greenhouse gasses. The endogeneity of abatement capital favors taxes, and it increases abatement.
Tipo: Working or Discussion Paper
Palavras-chave: Pollution control; Investment; Asymmetric information; Rational expectations; Choice of instruments; Environmental Economics and Policy; C61; D8; H21; Q28.
Ano: 2002
URL: http://purl.umn.edu/25071

A Whole Farm Analysis of the Influence of Auto-Steer Navigation on Net Returns, Risk, and Production Practices
Provedor de dados: 31
Autores: Shockley,   Jordan M.; Dillon,   Carl R.; Stombaugh,   Timothy S.
A whole farm economic analysis was conducted to provide a detailed assessment into the economic, risk, and production implications due to the adoption of auto-steer navigation. It was determined that auto-steer navigation was profitable for a grain farmer in Kentucky with net returns increasing up to 0.90% ($3.35/acre). Additionally, the technology could be used in reducing production risk. Adoption of the technology also alters production practices for optimal use.
Tipo: Journal Article
Palavras-chave: Economics; Farm management; Mean-variance; Precision agriculture; Simulation; Farm Management; Risk and Uncertainty; C61; C63; D81; Q12; Q16.
Ano: 2011
URL: http://purl.umn.edu/100640

Agriculture, Income Risks and Rural Poverty Dynamics: Strategies of Smallholder Producers in Kenya
Provedor de dados: 31
Autores: Kuyiah,   Joanne Wasswa; Obare,   Gideon A.; Herrero,   Mario; Waithaka,   Michael M.
Poverty in Kenya has been on the increase over the last decade. It is estimated that 56% of the total population live in absolute poverty. Most of the poor reside in rural areas where agriculture is the main livelihood activity. Majority of Kenya's farmers are smallholders. They account for 75% of the total agricultural output and about 70% of marketed agricultural produce. The fate of smallholder agriculture in this country is therefore central to poverty reduction. A collapse in output and incomes from smallholder agriculture is likely to have damaging welfare effects and retard pro-poor economic growth. Smallholders often operate in a risky environment, which affects the level and variability of household resource endowments and income. The importance...
Tipo: Conference Paper or Presentation
Palavras-chave: Smallholder farms; Income risk; Rural Poverty; Linear Programming; Kenya; Farm Management; C61; D13; L23; Q18.
Ano: 2006
URL: http://purl.umn.edu/25596

Value of Temperature-Activated Polymer-Coated Seed in the Northern Corn Belt
Provedor de dados: 31
Autores: Archer,   David W.; Gesch,   Russell W.
The value of an innovative seed technology is estimated in a discrete stochastic programming framework for a representative farm in the northern Corn Belt.  Temperature-activated polymer-coated seed has the potential to increase net returns by increasing yields due to early planting and use of longer season varieties, as well as reducing yield due to early planting and use of longer season varieties, as well as reducing yield loss due to delayed planting.  A biophysical simulation model was used to estimate the impact of polymer-coated seed on corn and soybean yields and on field day availability for five planting periods, three crop varieties, and two tillage systems on two different soils under varying weather conditions.
Tipo: Journal Article
Palavras-chave: Biophysical simulation; Corn; Mathematical programming; Soybean; Q12; C61.
Ano: 2003
URL: http://purl.umn.edu/43198

MCDM Farm System Analysis for Public Management of Irrigated Agriculture
Provedor de dados: 31
Autores: Gomez-Limon,   Jose Antonio; Berbel,   Julio; Arriaza Balmón,   Manuel.
In this paper we present a methodology within the multi-criteria paradigm to assist policy decision-making on water management for irrigation. In order to predict farmers' response to policy changes a separate multi-attribute utility function for each homogeneous group, attained applying cluster analysis, is elicited. The results of several empirical applications of this methodology suggest an improvement of the ability to simulate farmers' decision-making process compared to other approaches. Once the utility functions are obtained the policy maker can evaluate the differential impacts on each cluster and the overall impacts in the area of study (i.e. a river basin) by aggregation. On the empirical side, the authors present some studies for different...
Tipo: Conference Paper or Presentation
Palavras-chave: Multi-attribute utility theory; Water management; Irrigation; Policy analysis; Agricultural and Food Policy; Q25; Q15; C61.
Ano: 2005
URL: http://purl.umn.edu/24676

Evaluating Target Achievements in the Public Sector: An Application of a Rare Non-Parametric DEA and Malmquist Indices
Provedor de dados: 31
Autores: Odeck,   James.
This paper provides an assessment of the extent to which targets set by a public authority are achieved by its operational units. A rare DEA framework and its subsequent Malmquist indices are applied on data comprising 19 units over a four year period of 1996 to 1999. The mean efficiency scores by which targets are achieved across the sample years are moderate, in the range 0.81 to 0.93. Average productivity progress across the sample years has been 26 percent. The results illustrate the usefulness of DEA even when there are no inputs and the decomposable Malmquist index for productivity is an asset in exploring causes of productivity growth.
Tipo: Journal Article
Palavras-chave: Target achievement; Traffic safety; Data envelopment analysis; Malmquist indices; L92; C61.
Ano: 2005
URL: http://purl.umn.edu/37549

The Potential Cost to New Zealand Dairy Farmers from the Introduction of Nitrate-Based Stocking Rate Restrictions
Provedor de dados: 31
Autores: Neal,   Mark; Fulkerson,   William; Levy,   Gil; Wastney,   Meryl; Thorrold,   Bruce S.; Palliser,   Chris; Beukes,   Pierre; Folkers,   Chris.
Introducing a stocking rate restriction is one possible course of action for regulators to improve water quality where it is affected by nitrate pollution. To determine the impact of a stocking rate restriction on a range of New Zealand dairy farms, a whole-farm model was optimised with and without a maximum stocking rate of 2.5 cows per hectare. Three farm systems, which differ by their level of feed-related capital, were examined for the changes to the optimal stocking rate and optimal level of animal milk production genetics when utility was maximised. The whole-farm model was optimised through the use of an evolutionary algorithm called differential evolution. The introduction of a stocking rate restriction would have a very large impact on the...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental regulation; Dairy farms; Whole-farm model; Evolutionary algorithm; Environmental Economics and Policy; Livestock Production/Industries; Q12; Q52; C61.
Ano: 2006
URL: http://purl.umn.edu/25620

How Far Can Poultry Litter Go? A New Technology for Litter Transport
Provedor de dados: 31
Autores: Carreira,   Rita I.; Young,   Kenneth B.; Goodwin,   Harold L., Jr.; Wailes,   Eric J.
Exporting northwest Arkansas excess turkey and broiler litter to partially fertilize nutrient-deficient cropland in eastern Arkansas can be more cost effective than to supply all crop nutrients with chemical fertilizer only, given current high fertilizer prices.  Cost savings are greater if litter is baled in ultraviolet resistant plastic and transported via truck, since backhaul opportunities reduce truck rates, or alternatively, if raw litter is shipped via a truck-barge combination.  Rice is the crop that allows for greater savings according to a mathematical programming model implemented in General Algebraic Modeling System (GAMS).
Tipo: Journal Article
Palavras-chave: Baling poultry litter; Barge transportation; Cost minimization; Manure management; Mathematical programming; Nutrient surplus; Poultry litter; Truck transportation; Agribusiness; Crop Production/Industries; C61; C65; Q12; Q30; Q53.
Ano: 2007
URL: http://purl.umn.edu/37050

A Dynamic Decision Model of Technology Adoption under Uncertainty: Case of Herbicide-Resistant Rice
Provedor de dados: 31
Autores: Annou,   Mamane Malam; Wailes,   Eric J.; Thomsen,   Michael R.
Herbicide-resistant (HR) rice technology is a potential tool for control of red rice in commercial rice production.  Using an ex ante mathematical programming framework, this research presents an empirical analysis of HR rice technology adoption under uncertainty.  The analysis accounts for stochastic germination of red rice and sheath blight to model a profit maximization problem of crop rotation among HR rice, regular rice, and soybeans.  The results demonstrate that risk attitudes and technology efficiency determine adoption rates and optimal rotation patterns.
Tipo: Journal Article
Palavras-chave: Biotechnology; Herbicide resistance; Mathematical programming; Profit maximization; Rice; Risk; Rotation; Technology; Adoption; Crop Production/Industries; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q16; Q18; O33; C61.
Ano: 2005
URL: http://purl.umn.edu/43724

Technical Efficiency in Organic Farming: An Application on Italian Cereal Farms Using a Parametric Approach
Provedor de dados: 31
Autores: Madau,   Fabio A.
A stochastic frontier production model was applied to estimate technical efficiency in a sample of Italian organic and conventional cereal farms. The main purpose was to assess which production technique revealed higher efficiency. Statistical tests on the pool sample model suggested that differences between the two cultivation methods were significant from a technological viewpoint. Separate analyses of two sub-samples (93 and 138 observations for organic and conventional farms, respectively) found that conventional farms were significantly more efficient than organic farms, with respect to their specific technology (0.892 vs. 0.825). This implies that organic (conventional) cereal farmers could increase their income to 99.19 €/ha (40.95 €/ha). Analysis...
Tipo: Conference Paper or Presentation
Palavras-chave: Organic farming; Comparison analysis; Cereal-growing; Technical efficiency; Stochastic frontier production models; Crop Production/Industries; C61; Q18.
Ano: 2005
URL: http://purl.umn.edu/24545

PRESSURE FACTORS AFFECTING LOMBARDY AGRICULTURAL SYSTEM: THE ENVIRONMENTAL CONSEQUENCES OF THE FISCHLER REFORM
Provedor de dados: 31
Autores: Bulgheroni,   Claudia; Sali,   Guido.
This paper presents a regional model, based on Positive Mathematical Programming, which aims to evaluate the consequences of Fischler reform on the agricultural sector of the Lombardy irrigated lowland (Northern Italy). The model main focus is to quantify the agricultural land use changes due to the farmers reaction to the CAP reform main issues, such as single payment, and to simulate possible scenarios for the future. The model takes into account also the Water Frame Directive principles, in order to combine the assessment of both CAP issues and the potential irrigation water supplies reduction, which could deeply affect the area. The model input are obtained by means of the integration between FADN and SIARL (Agricultural Information System of Lombardy...
Tipo: Conference Paper or Presentation
Palavras-chave: CAP modelling; Fischler Reform; Positive Mathematical Programming; Regional model; Water Frame Directive; Agricultural and Food Policy; Environmental Economics and Policy; Research Methods/ Statistical Methods; Q18; Q15; C61.
Ano: 2008
URL: http://purl.umn.edu/44827

General Pattern Formation in Recursive Dynamical Systems Models in Economics
Provedor de dados: 31
Autores: Brock,   William A.; Xepapadeas,   Anastasios.
This paper presents a fairly general treatment of recursive infinite horizon forward looking optimizing systems on infinite dimensional spatial domains. It includes optimal control, an analysis of local stability of spatially flat optimal steady states and development of techniques to compute spatially heterogeneous optimal steady states. The paper also develops a concept of rational expectations equilibrium, a local stability analysis for spatially homogeneous rational expectations steady states, and computational techniques for spatially heterogeneous rational expectations steady states.
Tipo: Working or Discussion Paper
Palavras-chave: Pattern Formation; Spatial Spillovers; Optimal Control; Spillover Induced Instability; Growth Models; Research Methods/ Statistical Methods; C61; 041.
Ano: 2009
URL: http://purl.umn.edu/52345

Pricing Benefit Externalities of Soil Carbon Sequestration in Multifunctional Agriculture
Provedor de dados: 31
Autores: Hartell,   Jason G.
“Multifunctionality” emphasizes the benefit externality properties of nonfood products that coincide with agricultural commodity production, some of which also have public-good properties.  However, determining the willingness to pay for local benefit externalities is seen as necessary but daunting.  This paper pursues the idea that the valuation process might first start by estimating the incentives required to supply various levels of a benefit externality.  With the use of carbon sequestration through the adoption of no-till cultivation as an example of a multifunctional benefit externality, mathematical programming is used to derive representative price schedules.  The implication for incentive prices are examined in light of risk aversion.
Tipo: Journal Article
Palavras-chave: Carbon sequestration; Externalities; Multifunctionality; Quadratic programming; C61; D62; Q12; Q21.
Ano: 2004
URL: http://purl.umn.edu/43416

A Search Model for Joint Implementation
Provedor de dados: 31
Autores: Bella,   Giovanni.
The aim of this paper is to present a search model in the field of environmental economics, where so-called clean and dirty producers enter the trading market, both looking for a partner with whom to exchange the goods they are endowed with. The model derived in this paper is rather simple. Nevertheless, it is able to produce a series of interesting results and useful insights, and is conveniently used here as a framework to explain the functioning of Joint Implementation programmes for polluting emissions’ reduction.
Tipo: Working or Discussion Paper
Palavras-chave: Environmental economics; Search theory; Market failures; Environmental Economics and Policy; C61; O13; Q26.
Ano: 2009
URL: http://purl.umn.edu/54356

Development, Testing and Application of ACRE: An Agro-Economic Production Model on Regional Level
Provedor de dados: 31
Autores: Henseler,   Martin; Wirsig,   Alexander; Krimly,   Tatjana.
ACRE is an Agro-eConomic model for agricultural pRoduction on rEgional level. Based on an extension of Positive Mathematical Programming (PMP) this model was developed as a decision tool for politics with respect to questions of global change scenarios. The validity of the theoretical approach as well as the algorithms has been tested by calculations with empirical data. Currently, ACRE is applied in large interdisciplinary projects. This paper introduces the development of ACRE, from the theoretical framework to testing its validity and current application.
Tipo: Conference Paper or Presentation
Palavras-chave: Mathematical programming; Variant-activity; Regional model; Agricultural production model; Interdisciplinary projects; Agribusiness; C61; Q15; E23; Q21.
Ano: 2005
URL: http://purl.umn.edu/24770

The Effect of Climate Change on Transportation Flows and Inland Waterways Due to Climate-Induced Shifts in Crop Production Patterns
Provedor de dados: 31
Autores: Attavanich,   Witsanu; McCarl,   Bruce A.; Fuller,   Stephen W.; Vedenov,   Dmitry V.; Ahmedov,   Zafarbek.
This study was funded by the the University Transportation Center for Mobility, Texas Transportation Institute
Tipo: Conference Paper or Presentation
Palavras-chave: Grain Transportation; Climate change and agriculture; Climate change and transportation; Land use change; Supply of grain; Demand for grain; Crop production patterns; Inland waterways; Mississippi River Basin; Climate change adaptation; Welfare distribution; Corn transportation; Soybeans transportation; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; International Relations/Trade; Land Economics/Use; C61; L91; L92; Q15; Q17; Q54; R14; R41; R13.
Ano: 2011
URL: http://purl.umn.edu/109241

Using alterative whole-farm modelling approaches to assess farm enterprise selection, risk and welfare
Provedor de dados: 31
Autores: Komarek,   Adam M.; MacAulay,   T. Gordon.
Using an expected mean-variance model the changes in farm enterprise levels and indirect utility were examined under conditions of risk aversion, budget constraints and gross margin variance. An extension of the comparative statics of the expected mean-variance model was adopted by introducing a budget constraint into the constrained optimisation problem. A 10-year expected mean-variance whole-farm model was solved for a farm in the wheat-sheep zone of Australia to provide an empirical example. Results were obtained using no planning horizon (the static model) and then with a five-year rolling planning horizon (the dynamic model). In addition, enterprise levels were constrained to match levels observed on the farm so as to compare incomes between the...
Tipo: Conference Paper or Presentation
Palavras-chave: Whole-farm modelling; Enterprise selection; Risk.; Farm Management; Q12; C61.
Ano: 2011
URL: http://purl.umn.edu/100574

On the Economics of Rational Self-Medication
Provedor de dados: 31
Autores: Akpalu,   Wisdom.
It has been established in the medical literature that self-medicating with imperfect information about either the use of a genuine or counterfeit drug or based on wrong self-diagnosis of ailment, which is predominant especially in developing countries, is a risky investment in health capital. This paper models the decision to self-medicate and the demand for self-medicated drugs. We suppose that investment in self-medication depends on the perception of its effectiveness. The results obtained show that the decision to self-medicate depends on the relative price and perceived effectiveness of self-medication, the elasticity of the shadow value of health with respect to the quantity of health capital, and the relative effectiveness of self-medication in...
Tipo: Working or Discussion Paper
Palavras-chave: Health Production; Self-Medication; Risky Investment; Government Policy; Dynamic Analysis; Demand and Price Analysis; Health Economics and Policy; Institutional and Behavioral Economics; Risk and Uncertainty; I12; I18; D81; C61.
Ano: 2008
URL: http://purl.umn.edu/6363

A FARM LEVEL ANALYSIS OF THE RELATION BETWEEN CAP REFORMS AND LOCAL ENVIRONMENTAL LEGISLATIONS: HOW AND IN WHICH EXTENT FLEMISH DAIRY FARMERS CAN FILL UP EXTRA MILK QUOTA?
Provedor de dados: 31
Autores: Van der Straeten,   Bart; Buysse,   Jeroen; Nolte,   Stephan; Marchand,   Fleur L.; Lauwers,   Ludwig H.; Claeys,   Dakerlia; Van Huylenbroeck,   Guido.
The agricultural policies shift gradually from EU-level organised market interventions to local organised environmental policies. This paper explores the growth possibilities of the Flemish dairy sector with the outlook of a quota abolishment as a case study of this policy shift. The dairy quota policy seems very restrictive for the highly profitable Flemish dairy sector, but the environmental restrictions from the manure regulation can limit the growth of the dairy sector as well. The paper uses a spatial multi-agent simulation model applied to a sample of 40.000 farms to estimate price development of emission rights and their possible impact on the growth of the dairy production. The results show that a higher milk production leads to higher prices for...
Tipo: Conference Paper or Presentation
Palavras-chave: Milk quota; Manure emission rights; Mathematical programming; Flanders; Agricultural and Food Policy; Industrial Organization; Research Methods/ Statistical Methods; C02; C61; L11; Q18.
Ano: 2008
URL: http://purl.umn.edu/44846

The Free Trade Area of the Americas and the Market for Processed Orange Products
Provedor de dados: 31
Autores: Spreen,   Thomas H.; Brewster,   Charlene; Brown,   Mark G.
The proposed Free Trade Area of the Americas would join the world’s two largest processed orange producing regions: Brazil and the United States.  Because the United States currently imposes a sizeable tariff on imported processed orange products, there is concern by U.S. orange growers over possible adverse effects resulting from tariff elimination.  A model of the world processed orange market is developed as a spatial equilibrium model with implicit supply functions based on the dynamic behavior of orange production.  The model is used to estimate the impact of U.S. tariff elimination on U.S. production, grower and processor prices, and imports.  The results suggest a sizeable price impact on U.S. producers if the tariff is eliminated.
Tipo: Journal Article
Palavras-chave: Orange juice; Spatial equilibrium; Tariffs; Trade; C61; F13.
Ano: 2003
URL: http://purl.umn.edu/37837

Sacrifice, discounting and climate policy: five questions
Provedor de dados: 31
Autores: Karp,   Larry S.
I provide a selective review of discounting and climate policy. After reviewing evidence on the importance of the discount rate in setting policy, I ask whether standard models tend to exaggerate the sacrifices that the current generation needs to undertake in order to internalize climate damages. I then consider whether the risk of catastrophic damage really overwhelms discounting, in the determination of optimal policy. I revisit the question of how we actually think about the distant future.
Tipo: Working or Discussion Paper
Palavras-chave: Climate change; Discounting; Intergenerational conflict; Catastrophic risk; Hyperbolic discounting; Environmental Economics and Policy; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2009
URL: http://purl.umn.edu/51612

A Stochastic Multiple Players Multi-Issues Bargaining Model for the Piave River Basin
Provedor de dados: 31
Autores: Sgobbi,   Alessandra; Carraro,   Carlo.
The objective of this paper is to investigate the usefulness of non-cooperative bargaining theory for the analysis of negotiations on water allocation and management. We explore the impacts of different economic incentives, a stochastic environment and varying individual preferences on players’ strategies and equilibrium outcomes through numerical simulations of a multilateral, multiple issues, non-cooperative bargaining model of water allocation in the Piave River Basin, in the North East of Italy. Players negotiate in an alternating-offer manner over the sharing of water resources (quantity and quality). Exogenous uncertainty over the size of the negotiated amount of water is introduced to capture the fact that water availability is not known with...
Tipo: Working or Discussion Paper
Palavras-chave: Bargaining; Non-Cooperative Game Theory; Simulation Models; Uncertainty; Environmental Economics and Policy; C61; C71; C78.
Ano: 2007
URL: http://purl.umn.edu/7446

Questions of Costs About the French Bio-Fuel Sector by Year 2010
Provedor de dados: 31
Autores: Treguer,   David; Sourie,   Jean-Claude; Rozakis,   Stelios.
By the end of year 2010, each member state of the European Union (the EU) ought to incorporate 5.75% of bio-fuels in the total of fuels used for transportation purposes. In order to achieve such a target, tax incentives are implemented by the French government given that the production of bio-fuels still remains unprofitable, even if oil prices are about $60/barel. After a brief introduction (1), we will first demonstrate the importance borne by the cost of agricultural raw material in the total cost of biofuels (2). For this purpose a sequential multi annual LP model is used (3). Emphasis must be placed on the possible competition between food and energy crops, should the production of energy crops require land exceeding the mandatory 10% set-aside (4)....
Tipo: Conference Paper or Presentation
Palavras-chave: Bio-fuels; Common Agricultural Policy; Opportunity cost; Energy crops; Kyoto Protocol; Resource /Energy Economics and Policy; C61; Q18; Q42.
Ano: 2005
URL: http://purl.umn.edu/24560

Uncertainty in Integrated Assessment Models of Climate Change: Alternative Analytical Approaches
Provedor de dados: 31
Autores: Golub,   Alexander; Narita,   Daiju; Schmidt,   Matthias G.W.
Uncertainty plays a key role in the economics of climate change, and the discussions surrounding its implications for climate policy are far from settled. We give an overview of the literature on uncertainty in integrated assessment models of climate change and identify some future research needs. In the paper, we pay particular attention to three different and complementary approaches that model uncertainty in association with integrated assessment models: the discrete uncertainty modeling, the most common way to incorporate uncertainty in complex climate-economy models: the real options analysis, a simplified way to identify and value flexibility: the continuous-time stochastic dynamic programming, which is computationally most challenging but necessary...
Tipo: Working or Discussion Paper
Palavras-chave: Uncertainty; Learning; Economics of Climate Change; Integrated Assessment Models; Real Options; Environmental Economics and Policy; D81; Q54; C61.
Ano: 2011
URL: http://purl.umn.edu/99638

Modeling the Liberalisation of the Milk Market in Switzerland
Provedor de dados: 31
Autores: Flury,   Christian; Mack,   Gabriele; Rieder,   Peter; Pfefferli,   S.
Switzerland aims to liberalise the milk market by 2011. This will result in distinctive changes in the basic conditions for agriculture. The impacts of the liberalisation are investigated with a composite model obtained by combining an optimization model for the agricultural sector and a dynamic simulation model for the milk and meat market. The calculations with the composite model indicate that the milk price depends strongly on the phasing out of market support, while the abolition of milk quotas in 2009 is less decisive. An introduction of a dairy cow premium leads to a higher milk production, especially with abolished milk quotas. In this case the European milk price level represents the lower limit for the milk price in Switzerland. Compared to the...
Tipo: Conference Paper or Presentation
Palavras-chave: Dynamic simulation; Sectoral optimisation; Milk market; Milk quota; Agribusiness; C53; C61; O21; Q13; Q18.
Ano: 2005
URL: http://purl.umn.edu/24507

A Comparison of Parametric Approximation Techniques to Continuous-Time Stochastic Dynamic Programming Problems
Provedor de dados: 31
Autores: Kompas,   Tom; Chu,   Long.
We compare three parametric techniques to approximate Hamilton-Jacobi-Bellman equations via unidimensional and multidimensional problems. The linear programming technique is very efficient for unidimensional problems and offers a balance of speed and accuracy for multidimensional problems. A comparable projection technique is shown to be slow, but has stable accuracy, whereas a perturbation technique has the least accuracy although its speed suffers least from the curse of dimensionality. The linear programming technique is also shown to be suitable for problems in resource management, including applications to biosecurity and marine reserve design.
Tipo: Journal Article
Palavras-chave: Stochastic dynamic programming; Parametric approximation; Perturbation; Projection; Linear programming; Optimal fishing; Marine reserves; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; C61; C63; Q22.
Ano: 2010
URL: http://purl.umn.edu/95044

Measuring the Effects of Alternative Support Policy Instruments on Beef Supply
Provedor de dados: 31
Autores: Benjamin,   Catherine; Piot-Lepetit,   Isabelle.
The European Union beef market regulation is largely influenced by the Common Agricultural Policy (CAP). With the 1992 CAP reform, there was a partial shift by the EU from product price support to a more direct form of income support by way of direct payments. For beef there was a move to direct payments on intermediate products which was essentially a direct payment for the possession of various categories of animals and these were linked to a land resource base. The Agenda 2000 reform consists in a further price decrease associated with an increase in direct payments. The objective of this paper is to assess how the behaviour of beef producers is sensitive to changes in production prices and to changes in premiums. The analysis relies on an analytical...
Tipo: Conference Paper or Presentation
Palavras-chave: Beef supply; Dynamic modelling; Expectations; Direct payments; Common Agricultural Policy; Agricultural and Food Policy; C61; Q12; Q18.
Ano: 2002
URL: http://purl.umn.edu/24781

International Emission Strategies under the Threat of a Sudden Jump in Damages
Provedor de dados: 31
Autores: Nkuiya,   Bruno.
We characterize the equilibrium level of emissions, the equilibrium stock of global pollution and the discounted net social welfare for both the cooperative and non-cooperative equilibria when the countries face the threat of a sudden irreversible jump in the global damages at an unknown date. The goal is to analyze the impact of this type of uncertainty on the equilibrium behavior of the countries. We find that it can have a significant effect on those equilibria. Countries reduce their emissions to mitigate their exposure to this threat. As the level of threat rises, countries adjust their emissions to lower the stock of pollutant. However, although initially this threat has the effect of lowering the discounted net welfare, it can in the long run have a...
Tipo: Working or Discussion Paper
Palavras-chave: Global pollution; Environmental uncertainty; Regime shift; Stochastic differential games; Environmental Economics and Policy; C61; C7; D81; Q54.
Ano: 2011
URL: http://purl.umn.edu/117826

Planificacion multicriterio de explotaciones agrarias en areas tropicales protegidas. El caso de la zona protectora Guanare-Masparro (Venezuela)
Provedor de dados: 31
Autores: Flores,   Jose; Gomez-Limon,   Jose Antonio.
La presente investigación tiene como objetivo principal el desarrollo de una propuesta metodológica de planificación multicriterio con el fin de optimizar el uso de la tierra con fines agrarios en áreas protegidas tropicales. Para ello se han empleado las técnicas del Proceso Analítico Jerárquico (AHP) y la programación compromiso (PC), considerado objetivos de carácter económico, ambiental y social. La aplicación empírica desarrollada se ha centrado en un área protegida de Venezuela con tradicional vocación agraria. Los resultados de la planificación evidencia la existencia de importantes conflictos entre los objetivos planteados, así como la necesidad de la intervención pública para lograr un desempeño del sector agrario en concordancia con las...
Tipo: Journal Article
Palavras-chave: Agricultural planning; Protected areas; Analytic hierarchy process; Compromise programming; Venezuela; Agribusiness; Q25; Q15; C61.
Ano: 2006
URL: http://purl.umn.edu/8002

Social Learning and Parameter Uncertainty in Irreversible Investment----Evidence from Greenhouse Adoption in Northern China
Provedor de dados: 31
Autores: Wang,   Honglin; Reardon,   Thomas.
This paper introduces social learning into irreversible investment theory through parameter uncertainty, and shows that social learning could reduce parameter uncertainty to facilitate irreversible investment technology adoption. The theoretic model is tested by using household level data from energy saving greenhouse adoption in northern China, and empirical evidences are consistent with the theory: social learning has significantly positive impacts on greenhouse adoption, while market volatility discourages the adoption.
Tipo: Conference Paper or Presentation
Palavras-chave: Social Learning; Technology Adoption; Irreversible Investment; Parameter Uncertainty; Energy Saving Greenhouse; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; O12; O31; C61; D83; G12.
Ano: 2008
URL: http://purl.umn.edu/6310

KNOWLEDGE SPILLOVER, LEARNING INCENTIVES AND ECONOMIC GROWTH
Provedor de dados: 31
Autores: Tsur,   Yacov; Zemel,   Amos.
Knowledge spillover implies that the social value of knowledge is higher than its private value and leads to insufficient private investment in human capital.  This paper examines implications for economic growth and offers a remedy.  An incentive mechanism that implements the socially optimal outcome is offered based on learning subsidy and flat income or consumption taxes (each levied at a different phase of the growth process).  The scheme is self-financed in that the tax proceeds cover exactly the subsidy payments at each point of time.
Tipo: Working or Discussion Paper
Palavras-chave: Endogenous growth; Human capital; Knowledge spillover; Learning incentives; Linear taxes; International Development; C61; H21; O33; O38; O41.
Ano: 2004
URL: http://purl.umn.edu/14991

Multiple goals in farmers’ decision making: The case of sheep farming in Western Greece
Provedor de dados: 31
Autores: Sintori,   Alexandra; Rozakis,   Stelios; Tsiboukas,   Kostas.
Management strategies and performance differ among farmers, as a result of different, multiple and often conflicting goals. Many approaches to building farm level models that incorporate multiple goals have been developed over the years, most of which share a common weakness. The determination of the goals to be used as attributes in the utility function is the result of a highly interactive process with the individual farmer, often difficult to implement. In this study, we use a non-interactive methodology, described in recent literature, to elicit the utility function of selected sheep farmers in western Greece, since farmers often appear reluctant to answer straightforward questions about their goals and preferences. Τhe results indicate that sheep...
Tipo: Conference Paper or Presentation
Palavras-chave: Sheep farming; Mixed integer programming; Multiple goals; Noninteractive elicitation; Livestock Production/Industries; C61; D21; Q12.
Ano: 2009
URL: http://purl.umn.edu/51075

Programming Regional Rural Development for Poland: A Research Perspective
Provedor de dados: 31
Autores: Ziolkowska,   Jadwiga.
Since Mai 2004 Poland is a new EU member country and has, due to the short membership period, little experience in creating rural policy according to the EU regulations. Additionally, there is a centralised planning of rural policies. The aim of the poster is to present how financing of rural policy can be improved by means of scientific programming methods. The study shows how the modelling approach can be used to analyse the optimal budget allocation for the Polish Plan for Development of Rural Areas from a regional perspective to better reach defined objectives.
Tipo: Conference Paper or Presentation
Palavras-chave: Rural development; Policy for rural areas; Linear programming; Poland; Community/Rural/Urban Development; Q10; Q18; C61; Z0.
Ano: 2005
URL: http://purl.umn.edu/24677

Investing in Biogas: Timing, Technological Choice and the Value of Flexibility from Inputs Mix
Provedor de dados: 31
Autores: Di Corato,   Luca; Moretto,   Michele.
In a continuous-time framework we study the technology and investment choice problem of a continuous co-digestion biogas plant dealing with randomly fluctuating relative convenience of input factor costs. Input factors enter into the productive process together mixed according to a given initial rule. Being inputs relative convenience stochastically evolving, a successive revision of the initial rule may be desirable. Hence, when the venture starts the manager may or may not install a flexible technology allowing for such option. Investment is irreversible and flexibility is costly. The problem is solved determining in the light of future prospects the optimal revision and then playing backward fixing the investment timing rule.
Tipo: Working or Discussion Paper
Palavras-chave: Factor Proportions; Technological Choice; Flexibility; Real Options; Alternative Energy Source; Environmental Economics and Policy; C61; D24; Q42.
Ano: 2009
URL: http://purl.umn.edu/55283

Wind Power: The Economic Impact of Intermittency
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis.
Wind is the fastest growing renewable energy source for generating electricity, but economic research lags behind. In this study, therefore, we examine the economics of integrating large-scale wind energy into an existing electrical grid. Using a simple grid management model to investigate the impact of various levels of wind penetration on grid management costs, we show that costs of reducing CO2 emissions by relying more on wind power depend on the generation mix of the existing electricity grid and the degree of wind penetration, with costs ranging from $21 to well over $1000 per tonne of CO2 reduced. Costs are lowest if wind displaces large amounts of fossil fuel production and there is some hydroelectric power to act as a buffer. Hydro capacity has...
Tipo: Working or Discussion Paper
Palavras-chave: Wind power; Carbon costs; Electricity grids; Mathematical programming; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q54; Q41; C61.
Ano: 2009
URL: http://purl.umn.edu/54370

Selective vs. Broad-Spectrum Pesticides: When Do Private Decisions Differ from Socially Optimal Decisions?
Provedor de dados: 31
Autores: Grogan,   Kelly A.; Goodhue,   Rachael E.
This paper examines the spatial externalities of conventional and organic pest control methods to determine if, and how, the two types affect each other. These interactions make the problem more complicated than the usual analysis of a single externality. The numerical simulation model includes one organically managed and one conventionally managed field. One pest and one predator of the pest move between the two fields over five seasons. In each season, the conventional grower has the option of applying a broad-spectrum pesticide that kills the predator a selective pesticide that has no adverse effects on the predator but is either more expensive or less effective than the broad-spectrum pesticide. The organic grower can apply an organic pesticide,...
Tipo: Conference Paper or Presentation
Palavras-chave: Spatial-dynamic games; Spatial externalities; Non-cooperative games; Organic agriculture; Biological control; Agricultural policy; Agricultural and Food Policy; Crop Production/Industries; Resource /Energy Economics and Policy; C61; C72; Q18; Q52; Q57.
Ano: 2011
URL: http://purl.umn.edu/103760

The Effect of Climate Change, CO2 Fertilization, and Crop Production Technology on Crop Yields and Its Economic Implications on Market Outcomes and Welfare Distribution
Provedor de dados: 31
Autores: Attavanich,   Witsanu; McCarl,   Bruce A.
Many studies have done econometric estimates of how climate alters crop yields and or land rents in an effort to gain information on potential effects of climate change.  However, an important related factor, the atmospheric carbon dioxide (CO2) concentration, and in fact a driver of climate change is ignored.  This means the prior econometric estimates are biased as they infer what will happen under climate change from observations in the recent past, but without consideration of CO2 effects.  Furthermore although CO2 has been varying, it has proceeded at a very linear pace and cannot be disentangled from technological progress using historical crop yield data.  This paper is designed to overcome this issue and estimate the consequences that CO2 has and...
Tipo: Conference Paper or Presentation
Palavras-chave: Carbon Dioxide Fertilization; Crop Yield; Yield Variability; Climate Change; Crop Production Technology; Welfare Distribution; Market Outcomes; Stochastic Production Function; The Agricultural Sector Model; Feasible Generalized Least Squares; Crop Production/Industries; Land Economics/Use; Production Economics; Research and Development/Tech Change/Emerging Technologies; C61; C13; Q16; Q54; D69; D24.
Ano: 2011
URL: http://purl.umn.edu/103324

Non-Market Values and Optimal Marine Reserve Switching
Provedor de dados: 31
Autores: Yamazaki,   Satoshi; Grafton,   R. Quentin; Kompas,   Tom.
A stochastic bio-economic model is constructed to analyse the effects of marine reserve ‘switching’ between a ‘no take’ area and a harvested area. The model accounts for both market and non-market values of the fishery. Estimated parameters from the red throat emperor fishery from the Great Barrier Reef are used.   Simulations show that an optimal switching strategy is, under a range of scenarios, preferred to fixed reserve and no reserve strategies.  An important outcome is that the non-market values associated with the size of the fishery substantially affect both the returns from switching and the closure time.
Tipo: Report
Palavras-chave: Marine reserves; Stochastic control; Non-market values; Environmental Economics and Policy; Research Methods/ Statistical Methods; C61; Q22.
Ano: 2009
URL: http://purl.umn.edu/94825

Improved Program Planning Approaches Generates Large Benefits in High Risk Crop Farming
Provedor de dados: 31
Autores: Musshoff,   Oliver; Hirschauer,   Norbert.
This paper examines whether there is room for the improvement of farm program decisions through the incorporation of mathematical optimization in the practical planning process. Probing the potential for improvement, we investigate the cases of four German cash crop farms over the last six years. The formal planning approach includes a systematic time series analysis of farmspecific single gross margins and a stochastic optimization model. In order to avoid solutions that simply exceed the farmer’'s risk tolerance, the apparently accepted variance of the observed program’'s total gross margin which represents an observable reflection of the individual farmer'’s risk attitude is used as an upper bound in the optimization. For each of the 24 planning...
Tipo: Conference Paper or Presentation
Palavras-chave: Production program planning; Optimization; Uncertainty; Static distributions; Stochastic processes; Crop Production/Industries; C1; C61; M11; Q12.
Ano: 2007
URL: http://purl.umn.edu/10442

Taxes Versus Quantities for a Stock Pollutant with Endogenous Abatement Costs and Asymmetric Information
Provedor de dados: 31
Autores: Karp,   Larry S.; Zhang,   Jiangfeng.
Non-strategic firms with rational expectations make investment and emissions decisions. The investment rule depends on firms’ beliefs about future emissions policies. We compare emissions taxes and quotas when the (strategic) regulator and (nonstrategic) firms have asymmetric information about abatement costs, and all agents use Markov Perfect decision rules. Emissions taxes create a secondary distortion at the investment stage, unless a particular condition holds; emissions quotas do not create a secondary distortion. We solve a linear-quadratic model calibrated to represent the problem of controlling greenhouse gasses. The endogeneity of abatement capital favors taxes, and it increases abatement.
Tipo: Thesis or Dissertation
Palavras-chave: Pollution control; Investment; Asymmetric information; Rational expectations; Choice of instruments; Resource /Energy Economics and Policy; C61; D8; H21; Q28.
Ano: 2008
URL: http://purl.umn.edu/42877

CAN DOMESTICATION OF WILDLIFE LEAD TO CONSERVATION? THE ECONOMICS OF TIGER FARMING IN CHINA
Provedor de dados: 31
Autores: Abbott,   Brant; van Kooten,   G. Cornelis.
Tigers are a threatened species that might soon disappear in the wild. Not only are tigers threatened by deteriorating and declining habitat, but poachers continue to kill tigers for traditional medicine, decoration pieces and so on. Although international trade in tiger products has been banned since 1987 and domestic trade within China since 1993, tigers continue to be poached and Chinese entrepreneurs have established tiger farms in anticipation of their demise. While China desires to permit sale of tiger products from captive-bred tigers, this is opposed on the grounds that it likely encourages illegal killing. Instead, wildlife conservationists lobby for more spending on anti-poaching and trade-ban enforcement. In this study, a mathematical...
Tipo: Conference Paper or Presentation
Palavras-chave: Endangered species and extinction; Wildlife farming; Economics of natural; Mathematical bioeconomics; Environmental Economics and Policy; Q27; C61; Q57.
Ano: 2010
URL: http://purl.umn.edu/61071

Cod today and none tomorrow: The Economic Value of a Marine Reserve
Provedor de dados: 31
Autores: Grafton,   R. Quentin; Kompas,   Tom.
The northern cod fishery was once one of the world’s largest capture fisheries. Using data from the fishery, this research calculated the economic value of a marine reserve using a stochastic optimal control model with a jump-diffusion process.   The analysis shows that, an optimal-sized marine reserve in this fishery would have prevented the fishery’s collapse and generated a triple payoff. Even if harvesting had been ‘optimal’ the profits from fishing would have been raised. The recovery time would also have decreased for the biomass to return to its former state and smoothed fishers’ harvests and profits. Following a negative shock, the chance of a catastrophic collapse would have been lowered.
Tipo: Report
Palavras-chave: Marine reserves; Stochastic control; Fisheries; Environmental Economics and Policy; C61; Q22.
Ano: 2009
URL: http://purl.umn.edu/94822

Analysis of profitability and risk in new agriculture in a Himalayan watershed by using dynamic non-linear programming model
Provedor de dados: 31
Autores: Sharma,   Rakesh Kumar; Sankhayan,   Prem Lall; Singh,   Ranveer.
Cropping pattern in the Himalayan region of India has undergone a significant change in the recent past. Introduction of horticultural crops of vegetables, fruits and flowers have led to more intensive agriculture. Such a change, resulting in higher incomes and improvements of the overall living conditions has, however, been accompanied with increased income risk. This emphasises a need for proper analysis of the cropping pattern, at an appropriate scale, such as, a micro watershed. This was achieved by constructing a dynamic non-linear programming model incorporating appropriate objective function, constraints and crop and livestock activity budgets along with risk component present in the gross returns. The model was then solved under alternate policy...
Tipo: Conference Paper or Presentation
Palavras-chave: Cropping pattern; Gross margins; Himachal Pradesh; Optimization; Covariance; Crop Production/Industries; Farm Management; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; Risk and Uncertainty; C61; Q12; Q15.
Ano: 2009
URL: http://purl.umn.edu/51404

Bioeconomic modeling of wetlands and waterfowl in Western Canada: Accounting for amenity values
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Withey,   Patrick; Wong,   Linda.
This study extends an original bioeconomic model of optimal duck harvest and wetland retention by bringing in amenity values related to the nonmarket (in situ) benefits of waterfowl plsi the ecosystem values of wetlands themselves. The model maximizes benefits to hunters as well as the amenity values of ducks and ecosystem benefits of wetlands, subject to the population dynamics. Results indicate that wetlands and duck harvests need to be increased relative to historical levels. Further, the socially optimal ratio of duck harvest to wetlands is larger than what has been observed historically. Including amenity values leads to a significant increase in the quantity of wetlands and duck harvests relative to models that focus only on hunting values.
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomic modelling; Wetland protection; Wildlife management; Nonmarket values; Prairie pothole region; Environmental Economics and Policy; Q57; C61; Q25.
Ano: 2010
URL: http://purl.umn.edu/94936

Ambiguous Aggregation of Expert Opinions: The Case of Optimal R&amp;D Investment
Provedor de dados: 31
Autores: Athanassoglou,   Stergios; Bosetti,   Valentina; Maere d'Aertrycke,   Gauthier de.
How should a decision-maker allocate R&amp;D funds when a group of experts provides divergent estimates on a technology's potential effectiveness? To address this question, we propose a simple decision-theoretic framework that takes into account ambiguity over the aggregation of expert opinion and a decision-maker's attitude towards it. In line with the paper's focus on R&amp;D investment, decision variables in our model may affect experts' subjective probability distributions of the future potential of a technology. Using results from convex optimization, we are able to establish a number of analytical results including a closed-form expression of our model's value function, as well as a thorough investigation of its differentiability properties. We apply...
Tipo: Working Paper
Palavras-chave: Ambiguity; Expert Opinions; R&amp;D; Convex/Conic Optimization; Aggregation; Research and Development/Tech Change/Emerging Technologies; C61; D81; Q42.
Ano: 2012
URL: http://purl.umn.edu/121719

Programación de la comercialización mensual agraria: el caso de los cultivos hortícolas en la provincia de Almería
Provedor de dados: 31
Autores: Perez-Mesa,   Juan Carlos.
RESUMEN: Este artículo trata sobre la programación de la producción agraria, entendida no sólo como la selección entre varios cultivos sino, también, como la distribución temporal de los mismos. Primero se estudia la programación de la producción para una empresa, donde sus decisiones no afectan a los precios de equilibrio en el mercado: en este caso se propone la utilización de un modelo de Markowitz adaptado a la programación temporal de la comercialización. Posteriormente, se analiza la ordenación de la venta para un operador que tuviese capacidad, por su volumen de comercialización, de alterar el equilibrio de mercado: en este caso se propone la utilización de un modelo de maximización mensual de ingresos y márgenes.  SUMMARY: This article analyses the...
Tipo: Journal Article
Palavras-chave: Exportación; Optimización; Planificación; Programación matemática; Optimization; Planning; Mathematical programming; Export; Community/Rural/Urban Development; International Relations/Trade; Research Methods/ Statistical Methods; C61; Q13.
Ano: 2008
URL: http://purl.umn.edu/37187

ECONOMIC EFFECTS OF A BAN AGAINST ANTIMICROBIAL DRUGS USED IN U.S. BEEF PRODUCTION
Provedor de dados: 31
Autores: Mathews,   Kenneth H., Jr.
Economic effects for three scenarios of antimicrobial drug use in livestock production -- a no-ban scenario and two levels of bans -- are examined through cost minimization and a partial equilibrium analysis.  Results indicate that regulating antimicrobial drug use in livestock production would increase per-unit costs of producers previously using drugs and reduce beef supplies in the short run, reducing consumer surplus.  Producers not previously using drugs would benefit from short-run price increases.
Tipo: Journal Article
Palavras-chave: Antimicrobial drug; Ban; Beef production; Cost minimization; Feed efficiency; Growth function; Growth promotant; Livestock Production/Industries; C61; D21; D41; I118; Q11; Q12; Q18; R38.
Ano: 2002
URL: http://purl.umn.edu/15068

Intertemporal Risk Management Decisions of Farmers under Preference, Market, and Policy Dynamics
Provedor de dados: 31
Autores: Wang,   H. Holly; Du,   Wen.
This paper adapts a generalized expected utility (GEU) maximization model (Epstein and Zin, 1989 and 1991) to examine the intertemporal risk management of wheat producers in the Pacific Northwest. Optimization results based on simulated data indicate the feasibility of the GEU optimization as a modeling framework. It further extends the GEU model by incorporating a welfare measure, the certainty equivalent, to investigate the impacts of U.S. government programs and market institutions on farmers' risk management decisions and welfare. A comparison between the GEU and other expected utility models further implies GEU has the advantage of specifying farmers' intertemporal preferences separately and completely. Impact analysis results imply that farmers'...
Tipo: Conference Paper or Presentation
Palavras-chave: Generalized expected utility; Risk management; Multi-period production; Dynamic optimization; Intertemporal preference; Market institution; Government payments; Risk and Uncertainty; Q14; D9; C61.
Ano: 2005
URL: http://purl.umn.edu/19526

Distortions in a Multi-Level Co-Financing System: The Case of the Agri-Environmental Program of Saxony-Anhalt
Provedor de dados: 31
Autores: Kirschke,   Dieter; Hager,   Astrid; Jechlitschka,   Kurt; Wegener,   Stefan.
In this paper we analyze the impact of the EU multi-level co-financing system on regional policy-making and priority setting taking the case of the agri-environmental program of Saxony-Anhalt in Germany. The implications of several co-financing scenarios are analyzed and compared to respective lump-sum transfers using an interactive linear programming approach. The results reveal that regional choices on agri-environmental measures are strongly influenced by the co-financing system leading to distortions. The extent of these distortions depends on the specific regional preferences and restrictions to be considered in the policy-making process.
Tipo: Conference Paper or Presentation
Palavras-chave: Agri-environmental programs; Co-financing; Federalism; Interactive programming; Policy-making; Environmental Economics and Policy; Financial Economics; Food Consumption/Nutrition/Food Safety; C61; H72; Q18.
Ano: 2006
URL: http://purl.umn.edu/25365

Exogenous Oil Shocks, Fiscal Policy and Sector Reallocations in Oil Producing Countries
Provedor de dados: 31
Autores: Cologni,   Alessandro; Manera,   Matteo.
Previous literature has suggested that different mechanisms of transmission of exogenous oil shocks are responsible for the negative effects on the economic performances of oil exporting countries. This paper aims at providing further evidence on the role of sectoral reallocation between private and public sectors in explaining the impact of shocks to oil revenues on the economic growth rates of major oil producing countries (namely the GCC - Gulf Corporation Council - countries). The effects of oil shocks and expansionary fiscal policy on the business cycle of oil producing countries are examined. The possibility to distinguish between various components of public sector spending policy (that is, purchases of consumption goods, investments in productive...
Tipo: Working or Discussion Paper
Palavras-chave: Oil Shocks; Dutch Disease; Resource Curse and Real Business  Cycle Modelling; Resource /Energy Economics and Policy; C61; E22; E62; Q48.
Ano: 2011
URL: http://purl.umn.edu/115726

Sequential Migration, and the German Reunification
Provedor de dados: 31
Autores: Birk,   Angela.
The paper develops a sequential migration model and derives a worker's optimal policies for migration and employment. With the worker's simulated reservation wage functions for employment and migration, a stationary equilibrium is defined. In that equilibrium, stationary distributions of employed and unemployed stayers and movers over different states are derived. The analysis of Markov equilibria shows that mainly unemployed skilled and unskilled migrants will migrate. I have referred to this unemployed self-selection of skilled and unskilled migrants. Furthermore, in the stationary equilibrium, a trade off between equity and efficiency is derived and represents the adverse effects when a government fosters income increases too much.
Tipo: Working or Discussion Paper
Palavras-chave: Sequential Migration; Markov Equilibria; German Reunification; Labor and Human Capital; C61; E27; J61.
Ano: 2004
URL: http://purl.umn.edu/26338

Integrating Wind Power in Electricity Grids: An Economic Analysis
Provedor de dados: 31
Autores: Liu,   Jia; van Kooten,   G. Cornelis; Pitt,   Lawrence.
As a renewable energy source, wind power is gaining popularity as a favoured alternative to fossil fuel, nuclear and hydro power generation. In Europe, countries are required to achieve 15% of their energy consumption from wind by 2010 as the EU strives to meet its Kyoto obligations. Wind power is considered to be environmentally friendly and low cost. While environmental friendliness has come under scrutiny because wind turbines continue to pose a hazard to birds, are visually unappealing, affect the uses of land and change air flows, the purpose of this paper is to examine the question of its presumed low cost and effectiveness at reducing CO2 emissions by replacing power generated from fossil fuels. To do so, we develop a mathematical programming model...
Tipo: Working or Discussion Paper
Palavras-chave: Renewable energy; Wind and nuclear power; Economics of power generation; Environmental Economics and Policy; Resource /Energy Economics and Policy; C61; Q40; Q54; Q55.
Ano: 2005
URL: http://purl.umn.edu/37010

Economic Impacts of Soybean Rust on the US Soybean Sector
Provedor de dados: 31
Autores: Gomez,   Miguel I.; Nunez,   Hector M.; Onal,   Hayri.
The spread of Asian Soybean Rust (ASR) represents a real threat to the U.S. soybean sector. We assess the potential impacts of ASR on domestic soybean production and commodity markets as well as the competitive position of the US in the soybean export market. We develop a mathematical stochastic dynamic sector model with endogenous prices to assess the economic impacts of ASR on US agriculture. The model takes into account the disease spread during the cropping season, the inherent uncertainty regarding the risk of infection, and the dichotomous decisions that farmers make (no treatment, preventive treatment, and curative treatment) facing the risk of infection. Our results suggest substantial impacts from potential ASR spread on agricultural output,...
Tipo: Conference Paper or Presentation
Palavras-chave: Asian Soybean Rust; Stochastic Models; Dynamic Models; Crop Production/Industries; C61; Q13.
Ano: 2009
URL: http://purl.umn.edu/49595

Energy Crop Supply in France: A Min-Max Regret Approach
Provedor de dados: 31
Autores: Kazakci,   Akin; Rozakis,   Stelios.
This paper attempts to estimate energy crop supply using an LP model comprising hundreds of representative farms of the arable cropping sector in France. In order to enhance the predictive ability of such a model and to provide an analytical tool useful to policy makers, interval linear programming (ILP) is used to formalise bounded rationality conditions. In the presence of uncertainty related to yields and prices it is assumed that the farmer minimises the distance from optimality once uncertainty resolves introducing an alternative criterion to the classic profit maximisation rationale. Model validation based on observed activity levels suggests that about 40% of the farms adopt the min-max regret criterion. Then energy crop supply curves, generated by...
Tipo: Conference Paper or Presentation
Palavras-chave: Interval linear programming; Min-max regret; Energy crops; France; Crop Production/Industries; Resource /Energy Economics and Policy; C61; D81; Q18.
Ano: 2005
URL: http://purl.umn.edu/24751

Incorporating Environmentally Compliant Manure Nutrient Disposal Costs into Least-Cost Livestock Ration Formulation
Provedor de dados: 31
Autores: Hadrich,   Joleen C.; Wolf,   Christopher A.; Black,   J. Roy; Harsh,   Stephen B.
Livestock rations are formulated to minimize feed cost subject to nutritional requirements for a target performance level, which ignores the potentially substantial cost of disposing of nutrients fed in excess of nutritional requirements. We incorporate nutrient disposal costs into a modified least-cost ration formulation model to arrive at a joint least-cost decision that minimizes the sum of feed and net nutrient disposal costs. The method is demonstrated with phosphorus disposal costs on a representative dairy farm. Herd size, land availability and proximity, crop rotation, and initial soil phosphorus content are shown to be important in determining phosphorus disposal costs.
Tipo: Journal Article
Palavras-chave: Environmental compliance; Linear programming; Livestock rations; Manure disposal; Agribusiness; Environmental Economics and Policy; Livestock Production/Industries; C61; Q12; Q52.
Ano: 2008
URL: http://purl.umn.edu/45525

The Economics of Geological CO2 Storage and Leakage
Provedor de dados: 31
Autores: van der Zwaan,   Bob; Gerlagh,   Reyer.
The economics of CO2 capture and storage in relation to the possibility of significant leakage of CO2 from geological reservoirs once this greenhouse gas has been stored artificially underground will be among the main determinants of whether CCS can significantly contribute to a deep cut in global CO2 emissions. This paper presents an analysis of the economic and climatic implications of the large-scale use of CCS for reaching a stringent climate change control target, when geological CO2 leakage is accounted for. The natural scientific uncertainties regarding the rates of possible leakage of CO2 from geological reservoirs are likely to remain large for a long time to come. We present a qualitative description, a concise analytical inspection, as well as a...
Tipo: Conference Paper or Presentation
Palavras-chave: Climate Change; Carbon Dioxide Emission Reduction; Technological Innovation; CO2 Capture and Storage (CCS); Geological Leakage; Environmental Economics and Policy; H21; D58; C61; O33; Q40.
Ano: 2008
URL: http://purl.umn.edu/6372

A Model of Producer Incentives for Livestock Disease Management
Provedor de dados: 31
Autores: Ranjan,   Ram; Lubowski,   Ruben N.
We examine the management of livestock diseases from the producers' perspective, incorporating information and incentive asymmetries between producers and regulators. Using a dynamic model, we examine responses to different policy options including indemnity payments, subsidies to report at-risk animals, monitoring, and regulatory approaches to decreasing infection risks when perverse incentives and multiple policies interact. This conceptual analysis illustrates the importance of designing efficient combinations of regulatory and incentive-based policies.
Tipo: Working or Discussion Paper
Palavras-chave: Livestock disease; Asymmetric information; Reporting; Indemnities; Risk management; Livestock Production/Industries; C61; D82; Q12; Q18; Q28.
Ano: 2004
URL: http://purl.umn.edu/15653

On the Theory and Practice of Water Regulation
Provedor de dados: 31
Autores: Tsur,   Yacov.
We study water regulation for a schematic water economy representing a wide range of real world situations. A water policy has inter- and intra-temporal components. The first determines the limits on extractions from the naturally replenished sources, given the stochastic nature of recharge processes associated with uncertain precipitation. The intra-temporal regulation is concerned mainly with the allocating of the extracted and produced water among the end-users. The prices that implement the optimal intra-temporal allocation are derived. Regulation issues associated with cost recovery and asymmetric information are discussed.
Tipo: Working or Discussion Paper
Palavras-chave: Scarcity; Pricing; Optimal allocation; Water economy; Resource /Energy Economics and Policy; C61; D82; Q11; Q25.
Ano: 2009
URL: http://purl.umn.edu/47503

Updated Arkansas Global Rice Model
Provedor de dados: 31
Autores: Wailes,   Eric J.; Chavez,   Eddie C.
The Arkansas Global Rice Model is based on a multi-country statistical simulation and econometric framework. The model consists of six sub regions. These regions are the U.S., South Asia, North Asia and the Middle East, the Americas, Africa and Europe. Each region comprises of several countries and each country model has a supply sector, a demand sector, a trade, stocks and price linkage equations. All equations used in this model were estimated using econometric procedures or identities. Estimates are based upon a set of explanatory variables including exogenous macroeconomic factors such as income, population, inflation rate, technology development, and especially, government determined policy variables which reflect the various mechanisms by which...
Tipo: Working or Discussion Paper
Palavras-chave: Rice; Trade model; Policy; Agricultural and Food Policy; Crop Production/Industries; Marketing; C02; C61; F11; F14; Q17; Q18.
Ano: 2010
URL: http://purl.umn.edu/94347

Efficiency under a Combination of Ordinal and Cardinal Information on Preferences
Provedor de dados: 31
Autores: Athanassoglou,   Stergios.
Replaced with a revised version of paper 10/05/11.
Tipo: Working or Discussion Paper
Palavras-chave: Random Assignment; Efficiency; Duality; Linear Programming; Environmental Economics and Policy; C61; D01; D60.
Ano: 2011
URL: http://purl.umn.edu/101288

Multicriteria and Multiperiod Programming for Scenario Analysis in Guadalquivir River Irrigated Farming
Provedor de dados: 31
Autores: Vecino,   Julio Berbel; Baldovín,   Maria Jose López; Gutierrez,   Carlos.
A multiperiod model based upon a multicriteria objective function has been developed for a representative area of the Guadalquivir Valley, dividing the irrigated area into homogeneous types of farming as identified by cluster analysis. The model was applied to different future scenarios with a time horizon of 10 years and several different farming environments. A set of eight sustainability indicators has been evaluated for the model. The results show that the evolution of crops over time is closely related to the political environment regarding the Common Agricultural Policy and the application of the Water Framework Directive. Methodological innovation has included the successful simultaneous introduction of MCDM and multiperiod programming techniques...
Tipo: Conference Paper or Presentation
Palavras-chave: Multiperiod programming; Multicriteria programming; Sustainable agriculture; Scenario analysis; Agribusiness; C61.
Ano: 2005
URL: http://purl.umn.edu/24612

Construction and Application of an LP Farm Model with an Integrated Life Cycle Assessment for the Determination of Sustainable Milk Production Systems
Provedor de dados: 31
Autores: Mohring,   Anke; Zimmermann,   Albert.
The increasingly stringent conditions underlying Swiss dairy production demand sustainable milk production systems that are economically optimized but also meet the ecological requirements of society.  To determine such systems, a comparative-static LP model was constructed at farm level.  Realistic production systems are reproduced in the model by means of binary variables.  An Life Cycle Assessment (LCA) was integrated into the model to determine the environmental impacts of the farm.  To this effect, the internal farm influences on production are illustrated in detail.  An initial application of the model, in which a comparison of different income-optimized production systems was carried out, revealed some goal conflicts between economics and ecology....
Tipo: Conference Paper or Presentation
Palavras-chave: Life Cycle Assessment (LCA); LP-model; Dairy production; Production system; Livestock Production/Industries; C61; Q12; Q51.
Ano: 2005
URL: http://purl.umn.edu/24714

Entwicklung eines Modells zur Projektion des Wirtschaftswachstums und der langfristigen Nachfrage nach Produktionsfaktoren in Deutschland: unter besonderer Berucksichtigung des informations- technologischen Innovationsprozesses
Provedor de dados: 31
Autores: Danckwerts,   Rudolf-Ferdinand; Grossmann,   Wolf Dieter; Henne,   Wolfgang.
Es wird das Konzept für ein makroökonomisches Strukturmodell mit integriertem Innovationsprozesskern zur Analyse und Projektion der Wirtschaftsentwicklung in Deutschland vorgestellt. Das geplante Modell soll explizit die Auswirkungen des immer bedeutsamer werdenden IuK-technologischen Innovationsprozesses auf das Wirtschaftswachstum erfassen. Das Modell besteht aus einem makroökonometrischen Teil zur Darstellung der gesamtwirtschaftlichen Entwicklung und einem systemdynamischen Teil zur Erfassung des Innovationsprozesses auf mikroökonomischer Ebene. Als Modellteile sind zwei bereits existierende Modelle, das HWWA-Modell und das ISIS-Modell, nach ihrer Erweiterung und Anpassung vorgesehen. Die erforderlichen Modifizierungen, das Verfahren zur Kopplung der...
Tipo: Working or Discussion Paper
Palavras-chave: Zeitreihenmodelle; Dynamische Analyse; Prognose und Simulation; Neue Ökonomie; Technischer Wandel; Research Methods/ Statistical Methods; C32; C53; C61; E17; O33.
Ano: 2003
URL: http://purl.umn.edu/26166

Evaluacion de alternativas de desacoplamiento total de ayudas COP: el caso de la agricultura de regadio en el valle del Guadalquivir
Provedor de dados: 31
Autores: Arriaza Balmón,   Manuel; Avilés,   Pedro Ruiz; Gomez-Limon,   Jose Antonio.
RESUMEN El presente artículo compara la reforma de la PAC aprobada en junio de 2003 con un hipotético escenario de mayor liberalización en el que se permite la substitución de cultivos COP (cereales, oleaginosas y proteaginosas) por cultivos hortícolas y/o patatas. La simulación se lleva a cabo mediante el cálculo de una función de utilidad multiatributo para cada grupo homogéneo de agricultores: tres grupos en cada una de las tres comunidades de regantes. El método de cálculo de las funciones de utilidad no requiere ninguna interacción con el centro decisor. La validación de los modelos confirma la validez de esta metodología para la simulación de las decisiones de cultivo de estos productores. Los resultados sugieren que con el sistema alternativo...
Tipo: Journal Article
Palavras-chave: CAP; Multicriteria Decision Making; Utility function; Decoupled subsidy; Q12; Q18; C61; Q15.
Ano: 2003
URL: http://purl.umn.edu/28799

Land Conversion Pace under Uncertainty and Irreversibility: too fast or too slow?
Provedor de dados: 31
Autores: Di Corato,   Luca; Moretto,   Michele; Vergalli,   Sergio.
In this paper stochastic dynamic programming is used to investigate land conversion decisions taken by a multitude of landholders under uncertainty about the value of environmental services and irreversible development. We study land conversion under competition on the market for agricultural products when voluntary and mandatory measures are combined by the Government to induce adequate participation in a conservation plan. We study the impact of uncertainty on the optimal conversion policy and discuss conversion dynamics under different policy scenarios on the basis of the relative long-run expected rate of deforestation. Interestingly, we show that uncertainty, even if it induces conversion postponement in the short-run, increases the average rate of...
Tipo: Working Paper
Palavras-chave: Optimal Stopping; Deforestation; Payments for Environmental Services; Natural Resources Management; Risk and Uncertainty; C61; D81; Q24; Q58.
Ano: 2011
URL: http://purl.umn.edu/119107

The Ghost of Extinction: Preservation Values and Minimum Viable Population in Wildlife Models
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Eiswerth,   Mark E.
The inclusion of a minimum viable population in bioeconomic modeling creates at least two complications that are not resolved by using a modified logistic growth function. The first complication can be dealt with by choosing a different depensational growth function. The second complication relates to the inclusion of the in situ benefits of wildlife into the analysis. Knowledge about the magnitude of the in situ benefits provides no guide for policy about conservation management. Simply knowing that people are willing to pay a large amount each year to protect a species says nothing about whether one should manage habitat to protect or enhance the species’ numbers, unless the species is in imminent danger of extinction. If willingness to pay is to be a...
Tipo: Working or Discussion Paper
Palavras-chave: Marginal willingness to pay; Endangered species and extinction; Minimum viable population; Environmental Economics and Policy; Q20; Q24; C61.
Ano: 2008
URL: http://purl.umn.edu/37912

Regulating Stock Externalities Under Uncertainty
Provedor de dados: 31
Autores: Newell,   Richard G.; Pizer,   William A.
Using a simple analytical model incorporating benefits of a stock, costs of adjusting the stock, and uncertainty in costs, we uncover several important principles governing the choice of price-based policies (e.g., taxes) relative to quantity-based policies (e.g., tradable permits) for controlling stock externalities. Applied to the problem of greenhouse gases and climate change, we find that a price-based instrument generates several times the expected net benefits of a quantity instrument. As in Weitzman (1974), the relative slopes of the marginal benefits and costs of controlling the externality continue to be critical determinants of the efficiency of prices relative to quantities, with flatter marginal benefits and steeper marginal costs favoring...
Tipo: Working or Discussion Paper
Palavras-chave: Stock; Externality; Regulation; Policy; Uncertainty; Price; Quantity; Tax; Tradable permit; Pollution; Climate change; Greenhouse Gas; Instrument choice; Risk and Uncertainty; Q28; D81; C61.
Ano: 2000
URL: http://purl.umn.edu/10471

DYNAMIC CONTROL AS MEASURE TO STABILIZE AGRICULTUTAL MARKETS: On Theory and Options to Correct Cyclical Movements
Provedor de dados: 31
Autores: Nuppenau,   Ernst-August.
This paper deals with a control theory approach to stabilize cyclical price movements. Firstly, we pursue a welfare economist’s approach, delineating a public objective function derived from consumer and producer surplus as well as trade budget at world market price. Trade is a con¬trol variable and the market price is a state variable. Moreover we assume adaptive formation of price expectation at the producer side. Secondly the control problem is outline and solved by discrete control theory. Thirdly, the paper makes suggestions how to translate the optimal control framework and results into a trade policy of the envisaged country. Finally, limitations are discussed and an outlook for broadening the concept for international concerns is offered.
Tipo: Presentation
Palavras-chave: Dynamic control; Expectations; Cyclical prices; Stabilization policy; Risk and Uncertainty; C54; C61; F61.
Ano: 2012
URL: http://purl.umn.edu/122467

Modelling Farm Level Economic Potential for Conversion to Organic Farming
Provedor de dados: 31
Autores: Kerselaers,   Eva; Govaerts,   Wim; Lauwers,   Ludwig H.; De Cock,   Lieve; Van Huylenbroeck,   Guido.
A farm model is developed for simulating the potential income change resulting from conversion to organic farming. The model uses conventional farm data, taken from the Belgian FADN. Given the normative character of the model, and the impossibility of calibration to historical conversion behaviour, two model variants, a rigid and a flexible, are created to broaden the analysis scope. Moreover, extra attention is paid to the verification process and sensitivity analysis. Results reveal that the economic potential for conversion is rather high, if farmers are willing to change their farm management sufficiently. Furthermore, conversion potential depends on the farm type and conventional farm characteristics. The model finally proves to be an interesting tool...
Tipo: Conference Paper or Presentation
Palavras-chave: Organic farming; Conversion period; Farm model; Linear programming; Environmental Economics and Policy; Farm Management; C61; Q12.
Ano: 2005
URL: http://purl.umn.edu/24732

ESTIMATING THE IMPORTANCE OF SHELF SPACE CONFIGURATION ON RETAILER'S PROFIT
Provedor de dados: 31
Autores: Roucan-Kane,   Maud; Martens,   Bobby J.; Preckel,   Paul V.
Retail shelf space allocation remains a central issue in grocery retailing. A literature review produced many studies on retail shelf space allocation, but none which evaluated shelf space allocation using three major factors at once: space, vertical height, and price. In this study, shelf space allocation was modeled from the perspective of a retailer maximizing profit using space, vertical height, and price. Using benchmarking, the results show how shelf configuration affects consumer demand and retailer profit. Parameters for the model were based on experience-based intuition. Although the initial results are not valuable at this point, the method and results create a rationale and motivation to gather primary data. Once primary data is collected, this...
Tipo: Working or Discussion Paper
Palavras-chave: Shelf space allocation; Retail; Optimization; Grocery; Elasticity; GAMS; Ketchup; Marketing; C61; L81.
Ano: 2007
URL: http://purl.umn.edu/7330

Regulation of Stock Externalities with Correlated Costs
Provedor de dados: 31
Autores: Karp,   Larry S.; Zhang,   Jiangfeng.
We study a dynamic regulation model where firms' actions contribute to a stock externality. The regulator and firms have asymmetric information about serially correlated abatement costs. With price-based policies such as taxes, or if firms trade quotas efficiently, the regulator learns about the evolution of both stock and costs. This ability to learn about costs is important in determining the ranking of taxes and quotas, and in determining the value of a feedback rather than an open-loop policy.
Tipo: Working or Discussion Paper
Palavras-chave: Pollution control; Asymmetric information; Learning; Correlated costs; Choice of instruments; Environmental Economics and Policy; C61; D8; H21; Q28.
Ano: 2003
URL: http://purl.umn.edu/25077

THE ECONOMICS OF LAND-ZONING
Provedor de dados: 31
Autores: Goetz,   Renan-Ulrich; Zilberman,   David.
Land-use restrictions are frequently applied to separate polluting from non-polluting activities. In contrast to the existing literature, we incorporate spatial and intertemporal aspects of the problem simultaneously and determine the border of the zones endogenously. The results, based on a two-stage optimization method, show that non-spatially differentiated Pigouvian taxes on the final emissions are able to establish the socially optimal outcome. Second-best instruments alone, such as a spatially differentiated tax on inputs or outputs are not able to support the socially optimal outcome and need to be complemented by land-zoning or land-use taxes. We compare the efficiency of different spatial environmental policies such as land-use taxes or land...
Tipo: Conference Paper or Presentation
Palavras-chave: Land-use taxes; Zoning; Land allocation; Environmental Economics and Policy; Land Economics/Use; R52; C61; H23; Q24; R38.
Ano: 2000
URL: http://purl.umn.edu/21828

Friction and the Multiplicity of Equilibria
Provedor de dados: 31
Autores: Karp,   Larry S.; Paul,   Thierry.
In familiar models, a decrease in the friction facing mobile factors (e.g., lowering their adjustment costs) increases a coordination problem, leading to more circumstances where there are multiple equilibria. We show that a decrease in friction can decrease coordination problems if, for example, a production externality arises from a changing stock of knowledge or a changing environmental stock. In general, the relation between the amount of friction that mobile factors face and the likelihood of multiple equilibria is non-monotonic.
Tipo: Working or Discussion Paper
Palavras-chave: Indeterminacy; Multiple equilibria; Coordination games; Factor reallocation; Environmental externality; Learning-by-doing; Costs of adjustment; Research Methods/ Statistical Methods; C61; J21; O13; R23.
Ano: 2005
URL: http://purl.umn.edu/25120

Sophisticated Program Planning Approaches Generate Large Benefits in High Risk Crop Farming
Provedor de dados: 31
Autores: Musshoff,   Oliver; Hirschauer,   Norbert.
Agricultural production relies to a great extent on biological processes in natural environments. In addition to volatile prices, it is thus heavily exposed to risks caused by the variability of natural conditions such as rainfall, temperature and pests. With a view to the apparently lacking support of risky farm production program decisions through formal planning models, the objective of this paper is to examine whether, and eventually by how much, farmers’ “intuitive” program decisions can be improved through formal statistical analyses and stochastic optimization models. In this performance comparison, we use the results of the formal planning approach that are generated in a quasi ex-ante analysis as a normative benchmark for the empirically observed...
Tipo: Conference Paper or Presentation
Palavras-chave: Stochastic optimization; Stochastic processes; Production risk; Program planning; Time series analysis; C1; C61; M11; Q12.
Ano: 2008
URL: http://purl.umn.edu/36865

Modelling Negotiated Decision Making: a Multilateral, Multiple Issues, Non-Cooperative Bargaining Model with Uncertainty
Provedor de dados: 31
Autores: Sgobbi,   Alessandra; Carraro,   Carlo.
The relevance of bargaining to everyday life can easily be ascertained, yet the study of any bargaining process is extremely hard, involving a multiplicity of questions and complex issues. The objective of this paper is to provide new insights on some dimensions of the bargaining process – asymmetries and uncertainties in particular – by using a non-cooperative game theory approach. We develop a computational model which simulates the process of negotiation among more than two players, who bargain over the sharing of more than one pie. Through numerically simulating several multiple issues negotiation games among multiple players, we identify the main features of players’ optimal strategies and equilibrium agreements. As in most economic situations,...
Tipo: Conference Paper or Presentation
Palavras-chave: Bargaining; Non-Cooperative Game Theory; Simulation Models; Uncertainty; Risk and Uncertainty; C61; C71; C78.
Ano: 2007
URL: http://purl.umn.edu/8224

Dynamic adjustments in the Dutch greenhouse sector due to environmental regulations
Provedor de dados: 31
Autores: Verreth,   Daphne M.I.; Emvalomatis,   Grigorios; Bunte,   Frank H.J.; Oude Lansink,   Alfons G.J.M.
Horticultural firms are dependent on energy to produce, while policy makers focus on reducing the use of energy and investment in energy-saving technologies. The paper aimed to asses Dutch greenhouse farmers‘ responses to policies that would affect prices of different energy inputs. The farmer’s behaviour is modelled in two steps: firms are assumed to maximize profit at given energy use level, and firms are assumed to minimize the discounted sum of energy costs. The model is estimated using farm survey data spanning the period 2001-2008. Short-run and long-run elasticities with respect to prices and investments in energy-using technology are estimated. The greenhouse sector shows a fast adjustment of energy capital towards its long-run equilibrium. This...
Tipo: Conference Paper or Presentation
Palavras-chave: Greenhouse horticulture; Energy; Dynamic duality; Adjustment costs; Agricultural and Food Policy; C51; C61; D92; Q12; Q18; Q48.
Ano: 2011
URL: http://purl.umn.edu/99364

Plant Species Protection Contracts: Modelling Contract Choice for Specialised Dairy Farms and Mixed Dairy Pig Fattening Farms in the Netherlands
Provedor de dados: 31
Autores: Peerlings,   Jack H.M.; Polman,   Nico B.P.
Proposals of the European Commission stress the future importance of agri-environmental payments within the rural development policy of the European Union. The aim of this paper is to present and discuss a model for choice for plant species protection contracts in the Netherlands. The model includes transaction costs, time and the possibility of lock-in situations related to contract choice. The approach discussed is flexible because it makes it possible to introduce all kinds of technical and institutional restrictions (differences in contract design).
Tipo: Conference Paper or Presentation
Palavras-chave: Agri-environmental contracts; Contract choice; Environmental Economics and Policy; C61; L14; Q12; Q24.
Ano: 2005
URL: http://purl.umn.edu/24728

The adoption of innovative cropping systems under price and production risks: a dynamic model of crop rotation choice
Provedor de dados: 31
Autores: Ridier,   Aude; Chaib,   Karim; Roussy,   Caroline.
In the paper we investigate the role played by both production and market risks on farmer’s decision to adopt long rotations (over 2 years), considered as innovative cropping systems. We build a multiperiod dynamic farm model (run under GAMS) that arbitrates each year between traditional and innovative rotations. With discrete stochastic programming, the production risk is accounted as an intra-year risk; yearly farming operations are declined according to a decision tree where probabilities are assigned. Subjective yield and cost distributions linked to this decision tree are elicited among a sample of 13 farmers that are experiencing this innovation in South-western France. The price risk is randomly distributed with a given market trend. The crop...
Tipo: Presentation
Palavras-chave: Innovative cropping systems; Dynamic model; Crop rotation decision; Risk; Subjective probabilities; Risk and Uncertainty; C61; D0; Q12; Q55.
Ano: 2012
URL: http://purl.umn.edu/122440

Assessing U.S. Household Purchase Dynamics for Dietary Fiber
Provedor de dados: 31
Autores: Henry-Osorio,   Miguel; Dong,   Diansheng.
This study updates existing literature on consumer/household demand for fiber by examining household purchase dynamics for dietary fiber. It uses a dynamic Tobit model that allows past purchase occasions to affect current purchase decisions for fiber in a framework that captures simultaneously state dependence, unobserved households heterogeneity preferences, and serial correlation caused by a stationary first-order choice process. The model controls for the unobserved heterogeneity by adopting a Gaussian random effects specification. It also captures variations in prices over time and controls for left-censoring. The dynamic model is estimated using the Geweke-Hajivasssiliou-Keane recursive probability simulator and a unique dataset that contains detailed...
Tipo: Presentation
Palavras-chave: Temporal dependence; Household choice dynamics; Habits; GHK recursive simulator; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; D10; Q11; C23; C61.
Ano: 2012
URL: http://purl.umn.edu/123954

Optimal Agricultural Credit Association Branch Office Locations
Provedor de dados: 31
Autores: Scaletta,   Timi M.; Stokes,   Jeffrey R.
Since the farm financial crisis of the 1980s, Farm Credit System banks continue to merge and consolidate to enhance competitiveness.  Two mixed-integer programming models of AgChoice Agricultural Credit Association (ACA), a recently merged ACA in Pennsylvania, were developed to determine the optimal number, location, and territory of branches.   The approach suggests useful information can be determined regarding the reconfiguration process after bank mergers, especially given the fact that the current AgChoice ACA configuration is available for comparison purposes.
Tipo: Journal Article
Palavras-chave: Agricultural Credit Association; Compromise programming; Farm Credit System; Location model; Mixed-integer programming; C61; G21; Q14.
Ano: 2003
URL: http://purl.umn.edu/37838

Land-use Change and Solar Energy Production: A Real Option Approach
Provedor de dados: 31
Autores: Ardjan,   Gazheli; Di Corato,   Luca.
In this paper a real option model is developed to examine the critical factors affecting the decision to lease agricultural land to a company installing a PV power plant. The leasing payment is certain while the net revenues from agriculture are uncertain. We identify the profit values at which the farmer decides to lease his plot vs. continue farming it. By applying the model to the province of Bologna (Italy), we illustrate the possible land-use change scenarios in this area. We conclude by discussing the importance of PV energy production as a source of income for farmers and its implications from a social perspective.
Tipo: Working Paper
Palavras-chave: Land Allocation; Real Options; Renewable Energy; Solar farm; Uncertainty; Resource /Energy Economics and Policy; C61; D81; Q24; Q42.
Ano: 2011
URL: http://purl.umn.edu/120041

Weather-Based Crop Insurance Contracts for African Countries
Provedor de dados: 31
Autores: Karuaihe,   Raphael N.; Wang,   H. Holly; Young,   Douglas L.
Weather constitutes the major source for production risk in agriculture. Weather index can be used construct crop insurance that demand less information and can avoid moral hazard and adverse selection problems. Based on mean-variance model, theoretical results on the optimal insurance coverage and its impact from risk preference, basis risk, and premium loading are derived, which are quite consistent to the empirical results from the expected utility model. Using South Africa corn data, we investigate growers' demand and efficiency of alternative hypothetical weather index crop insurance programs. In contrast to previous work that suggests that a single-variable weather index suffices to develop an insurance contract, this study shows that the insured...
Tipo: Conference Paper or Presentation
Palavras-chave: Risk and Uncertainty; C51; C61; G22; Q14.
Ano: 2006
URL: http://purl.umn.edu/25378

A Principal-Agent Model for Investigating Traceability Systems Incentives on Food Safety
Provedor de dados: 31
Autores: Resende Filho,   Moises de Andrade.
This article investigates the effects of contingent payments and a traceability system's expected traceback rate of success on the food safety effort exerted by raw material suppliers. This sheds light on when contingent payments and the reliability of a traceability system are substitutes and complements to each other in terms of inducing raw material suppliers to exert higher food safety effort. In addition, the effect of higher penalties and costs of food safety crisis on the effort to be induced by buyers (principal) on suppliers (agents) is investigated under a symmetric information setting. Finally, the asymmetric information setting is formalized as a principal-agent model and left to be explored in a future work. Some numerical exercises are...
Tipo: Conference Paper or Presentation
Palavras-chave: Information Asymmetry; Identity Preservation; Food Traceability; Supply Chain Management.; Food Consumption/Nutrition/Food Safety; D82; D86; C61.
Ano: 2007
URL: http://purl.umn.edu/7897

Consequences of the 2003 CAP Reform on a Mediterranean Agricultural System of Portugal
Provedor de dados: 31
Autores: Carvalho,   Maria Leonor da Silva; Godinho,   Maria de Lurdes Ferro.
Agriculture in dry land Mediterranean areas faces considerable level of production risk as result of the unpredictable weather. Governmental income stabilisation instruments have had a major impact on Mediterranean farms in changing land allocation, and changing income levels and variability. Using a mathematical programming model, the impact of the 2003 CAP reform on land allocation and on income variability is evaluated for a Portuguese Mediterranean farm. The results show an increase of extensification of production activities. They also show an increase in total farm income, a reduction in relative total income variability and an increase in relative production income variability.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural policy modelling; Decoupling; Mediterranean; Agricultural and Food Policy; Q18; C61.
Ano: 2005
URL: http://purl.umn.edu/24719

Optimal agricultural policy and PSE measurement: an assessment and application to Norway
Provedor de dados: 31
Autores: Blandford,   David; Brunstad,   Rolf Jens; Gaasland,   Ivar; Vardal,   Erling.
The producer support estimate (the successor to the producer support equivalent) calculated by the OECD is widely used as an indicator of distortions created by agricultural policies. In this paper we demonstrate that changes in the relative (percentage) PSE are not an accurate indicator of the implications of policy reform for domestic welfare or for trade distortions. We demonstrate that it is important to consider the implications of changes in both the level and the form of support in evaluating the impact of policy reform. Using a model of Norwegian agriculture we show that reforms indicated towards the provision of public goods, while apparently leading to an increase in relative support, are actually superior to existing agricultural policies or to...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural policy; Trade distortion; Domestic support; Producer subsidy estimate (PSE); Agricultural and Food Policy; C61; F13; F18; Q17; Q18.
Ano: 2008
URL: http://purl.umn.edu/36769

Climate Policy When the Distant Future Matters: Catastrophic Events with Hyperbolic Discounting
Provedor de dados: 31
Autores: Karp,   Larry S.; Tsur,   Yacov.
Low probability catastrophic climate change can have a significant influence on policy under hyperbolic discounting. We compare the set of Markov Perfect Equilibria (MPE) to the optimal policy under time-consistent commitment. For some initial levels of risk there are multiple MPE; these may involve either excessive or insufficient stabilization effort. These results imply that even if the free-rider problem amongst contemporaneous decision-makers were solved, there may remain a coordination problem amongst successive generations of decision-makers. A numerical example shows that under plausible conditions society should respond vigorously to the threat of climate change.
Tipo: Working or Discussion Paper
Palavras-chave: Abrupt climate change; Event uncertainty; Catastrophic risk; Hyperbolic discounting; Markov Perfect Equilibria; Environmental Economics and Policy; Risk and Uncertainty; C61; C73; D63; D99; Q54.
Ano: 2007
URL: http://purl.umn.edu/7186

Dynamic Optimization of Nitrogen Use in Agriculture
Provedor de dados: 31
Autores: Burnett,   J. Wesley; Ferrer,   Myra Clarisse R.
Agricultural production is highly dependent on inorganic substances including fertilizers. High-yielding crop varieties, such as corn, require large amounts of primary nutrients including nitrogen, phosphorus and potassium. Farmers often add a surplus of nutrients to crops to maximize yields. Utilization of primary nutrients has increased by more than 300% while that of nitrogen alone has increased by more than 600% between 1960 and 2007 (USDA, 2009). From 1964 to 2007, the use of nitrogen in the corn sector alone increased from 1,623,000 to 5,714,000 nutrient tons (USDA, 2009).             While increasing production, increased fertilizer use can potentially create negative externalities in the form of nitrate-nitrogen contamination in groundwater....
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics; Nitrogen/Nitrate Contamination; Dynamic Optimization; Agriculture; Agricultural and Food Policy; Demand and Price Analysis; Environmental Economics and Policy; C61; C63; Q10; Q51; Q53.
Ano: 2010
URL: http://purl.umn.edu/96032

Application of a Spatial Water Model in a Chinese Watershed
Provedor de dados: 31
Autores: Fang,   Lan; Nuppenau,   Ernst-August.
China’'s fast growing economy has brought some environmental problems, especially in water administration. Inefficiencies in irrigation activities have created severe negative effects to the environment of rural communities, and the more serious water shortages hamper food production, too. Major questions at hand are, how to improve water use efficiency, to reduce negative external effects, to optimize water allocation in agriculture, to invest in water saving technologies, and to assure more water for high value added agriculture. This paper investigates the impacts of irrigation technologies and investments in water saving on the rural economy and the environment. By taking into account individual farmers' inclination to adopt modern water-saving...
Tipo: Conference Paper or Presentation
Palavras-chave: A spatial model; Water use efficiency; Adoption of irrigation technology; Technology; Resource /Energy Economics and Policy; C61; Q25; Q56.
Ano: 2006
URL: http://purl.umn.edu/25437

Economic Growth and the Environment with Clean and Dirty Consumption
Provedor de dados: 31
Autores: Orecchia,   Carlo; Tessitore,   Maria Elisabetta.
This paper aims to verify the existence of the Environmental Kuznets Curve (EKC) or inverted U-shaped relationship between economic growth and environmental degradation in the context of endogenous growth. An important feature of this study is that the EKC is examined in the presence of pollution as a by product of consumption activities; also, pollution is a stock variable rather than a flow and tends to accumulate over time. In order to highlight the role of consumption on the environment, consumers do not consider directly pollution in the maximization problem and are assumed to choose between two different consumption types, characterized by a different impact on the environment (i.e. dirty and clean consumption). We find that substitution of dirty...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Kuznets Curve; Economic Growth; Pollution; Consumption; Consumption behaviour; Environmental Economics and Policy; C61; Q56; O44.
Ano: 2011
URL: http://purl.umn.edu/115734

A Multi-Period Analysis of Two Common Livestock Management Strategies Given Fluctuating Precipitation and Variable Prices
Provedor de dados: 31
Autores: Ritten,   John P.; Frasier,   W. Marshall; Bastian,   Christopher T.; Paisley,   Steven I.; Smith,   Michael A.; Mooney,   Sian.
Many areas of the US recently endured a severe drought and management strategies to cope with the lack of forage production varied. A multi-period mathematical model is presented that estimates the outcomes of two common producer responses to changes in precipitation, partial liquidation and purchasing hay, given fluctuating cattle prices over a long term planning horizon. Results were further summarized with regression analysis and selected elasticities were calculated to reflect the sensitivity of outcomes to variability in precipitation and livestock prices. Although little impact was seen from utilizing additional hay as a strategy during drought, producers who follow this strategy are in a position to market more animals immediately post drought in...
Tipo: Journal Article
Palavras-chave: Drought management; Mathematical programming; Herd liquidation; Price cycle; Cattle management; Agribusiness; Agricultural Finance; Farm Management; Livestock Production/Industries; Production Economics; Productivity Analysis; Research Methods/ Statistical Methods; Q12; C61; D24.
Ano: 2010
URL: http://purl.umn.edu/90673

AGRICULTURAL PRICE VOLATILITY UNDER CLIMATE CHANGE: The Impact of Multiple Objectives on Commodity Prices
Provedor de dados: 31
Autores: Fuss,   Sabine; Havlik,   Petr; Szolgayova,   Jana; Obersteiner,   Michael; Schmid,   Erwin.
Agricultural price volatility has moved to the forefront of research efforts and political discussion, where much work is already being undertaken with respect to the impact of fluctuations in input prices (e.g. fertilizer, feed and energy). In this paper we also want to take into account the impact of climate change on prices via increased volatility in crop yields. In addition, we analyze the impact of having multiple objectives competing for the land on which crops are grown. In particular, we want to address the concerns that have been voiced about biofuel targets and calls for prioritization of food security.
Tipo: Presentation
Palavras-chave: Energy; Food security; Food price volatility; Optimization under uncertainty; Risk and Uncertainty; Q12; Q18; Q28; C61; D81.
Ano: 2012
URL: http://purl.umn.edu/122539

Can Forest Management Strategies Sustain The Development Needs Of The Little Red River Cree First Nation?
Provedor de dados: 31
Autores: Krcmar,   Emina; Nelson,   Harry; van Kooten,   G. Cornelis; Vertinsky,   Ilan; Webb,   Jim.
In this study, we explore whether projected socio-economic needs of the Little Red River Cree Nation (LRRCN) can be met using the natural resources to which they have access. To answer this question, we employ a dynamic optimization model to assess the capacity of the available forest base to provide for anticipated future needs of the LRRCN. Results for alternative management strategies indicate that decision-makers face significant tradeoffs in deciding an appropriate management strategy for the forestlands they control.
Tipo: Working or Discussion Paper
Palavras-chave: Boreal forest; First Nations; Forest management; Sustainability; Community/Rural/Urban Development; Resource /Energy Economics and Policy; C61; Q23.
Ano: 2005
URL: http://purl.umn.edu/37012

TO NEGOTIATE OR TO GAME THEORIZE: Negotiation vs. Game Theory Outcomes for Water Allocation Problems in the Kat Basin, South Africa
Provedor de dados: 31
Autores: Dinar,   Ariel; Farolfi,   Stefano; Patrone,   Fioravante; Rowntree,   Kate.
The 6th MEETING ON GAME THEORY AND PRACTICE Zaragoza, Spain 10-12 July 2006
Tipo: Working or Discussion Paper
Palavras-chave: Negotiation; Role-playing game; Core; Nucleolus; Shapley value; Water allocation; Economic efficiency; Planning models; Resource /Energy Economics and Policy; C61; C71; C78; Q25; Q56; R14.
Ano: 2006
URL: http://purl.umn.edu/60888

Market Structure and the Penetration of Alternative Energy Technologies
Provedor de dados: 31
Autores: Tsur,   Yacov; Zemel,   Amos.
Energy market prices ignore external effects, hence miss-allocate energy generation between (polluting) fossil fuels and (clean) solar technologies. Correcting the failure requires understanding the market allocation forces at hand. An important feature of solar energy is that its cost of supply is predominantly due to upfront investments in capital infrastructure (rather than to the actual supply rate) and this feature has far reaching implications for the market allocation outcome. Studying the market allocation process, we specify the conditions under which solar technologies penetrate the energy sector. The framework is then used to analyze policy regulation in the form of taxing fossil energy and subsidizing investments in solar energy. The first...
Tipo: Working or Discussion Paper
Palavras-chave: Energy; Solar technologies; Fossil fuels; Price thresholds; Regulation; Environmental damage; Learning by doing; Resource /Energy Economics and Policy; Marketing; C61; Q42; Q58.
Ano: 2009
URL: http://purl.umn.edu/47174

An empirical comparison of different risk measures in portfolio optimization
Provedor de dados: 31
Autores: Hoe,   Lam Weng; Saiful Hafizah,   Jaaman; Zaidi,   Isa.
Risk is one of the important parameters in portfolio optimization problem. Since the introduction of the mean-variance model, variance has become the most common risk measure used by practitioners and researchers in portfolio optimization. However, the mean-variance model relies strictly on the assumptions that assets returns are multivariate normally distributed or investors have a quadratic utility function. Many studies have proposed different risk measures to overcome the drawbacks of variance. The purpose of this paper is to discuss and compare the portfolio compositions and performances of four different portfolio optimization models employing different risk measures, specifically the variance, absolute deviation, minimax and semi-variance. Results...
Tipo: Journal Article
Palavras-chave: Portfolio; Optimization; Risk measures; Variance.; Financial Economics; CO2; C61; G11.
Ano: 2010
URL: http://purl.umn.edu/95934

CLIMATE CHANGE MITIGATION AND FUTURE FOOD CONSUMPTION PATTERNS
Provedor de dados: 31
Autores: Valin,   Hugo; Havlik,   Petr; Mosnier,   Aline; Obersteiner,   Michael.
Discussions on climate change increasingly emphasize the contribution of agricultural activities to anthropogenic greenhouse gases emissions. In this paper, we investigate from a supply to demand side perspective the stress between food demand and climate change challenges up until 2030. We examine how more stringent climate change mitigation policies could alter agricultural markets and put at risk the nutrition possibilities of populations. We use for this purpose GLOBIOM, an applied partial equilibrium model covering, at the world scale and a fine grid resolution, the main land-based sectors: agriculture, forestry and bioenergy. For this exercise, the model is fully linked to a semi-flexible endogenous demand system with non-linear Engel’s curves. Our...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; C61; Q11; Q24; Q54.
Ano: 2010
URL: http://purl.umn.edu/116392

Spatial Externalities and Vector-Borne Plant Diseases:   Pierce’s Disease and the Blue-Green Sharpshooter in the Napa Valley
Provedor de dados: 31
Autores: Fuller,   Kate B.; Alston,   Julian M.; Sanchirico,   James N.
Pierce’s Disease (PD) is a bacterial disease that can kill grapevines over a span of one to three years.  In this paper, we examine and model PD and vector control decisions made at the vineyard level in the Napa Valley in an effort to understand how the pest and disease affect individual growers, and to examine spatial externality issues and potential benefits from cooperation between adjacent vineyards.  The model that we created adds to the literature by (a) treating grape vines as capital stocks that take time to reach bearing age and thus cannot be immediately replaced in the event of becoming diseased.  We also (b) relax the assumption of an interior solution by examining the boundaries of parameter space for which winegrape growing is profitable and...
Tipo: Working or Discussion Paper
Palavras-chave: Pierce’s Disease; Winegrapes; Perennial crop modeling; Agricultural pests and diseases; Optimal control theory; Crop Production/Industries; Production Economics; Resource /Energy Economics and Policy; Q12; Q24; C61.
Ano: 2011
URL: http://purl.umn.edu/103865

Evaluating CAP alternative policy scenarios through a system dynamics approach in rural areas of Greece
Provedor de dados: 31
Autores: Efstratoglou,   Sophia; Giannakis,   Elias; Psaltopoulos,   Dimitrios.
Current considerations for the post-2013 CAP create the need for the investigation and evaluation of alternative CAP scenarios and their effects on agriculture, environment and regional development in EU rural areas. To this end, a system-dynamics model is developed and utilized to evaluate the impacts of alternative CAP scenarios in a Greek rural area (prefecture of Trikala). This particular model features four basic subsystems (agriculture, environment, regional economy and human resources) specified and analyzed through a linear programming model, a dynamic input-output model and an age-cohort demographic model, respectively. Four alternative policy scenarios are specified, dealing with possible developments on Pillars 1 and 2. Model simulations produce...
Tipo: Conference Paper or Presentation
Palavras-chave: CAP; Policy impact assessment; Rural development; System dynamics; Agricultural and Food Policy; C61; C67; Q18; R58.
Ano: 2011
URL: http://purl.umn.edu/99361

Salvage the treasure of geographic information in Farm census data
Provedor de dados: 31
Autores: Gocht,   Alexander; Roder,   Norbert.
In Germany, since several decades the RAUMIS modelling system is applied for policy impact assessments to measure the impact of agriculture on the environment. A disaggregation at the municipality level with more than 9.600 administrative units, instead of currently used 316 counties, would tremendously improve the environmental impact analysis. Two sets of data are used for this purpose. The first are geo-referenced data, that are, however, incomplete with respect its coverage of production activities in agriculture. The second set is the micro census statistic itself, that has a full coverage, but data protection rules (DPR) prohibit its straightforward use. The paper show how this bottleneck can be passed to obtain a reliable modelling data set at...
Tipo: Conference Paper or Presentation
Palavras-chave: Highest Posterior Density estimator (HPD); RAUMIS; Down scaling; Research Methods/ Statistical Methods; C11; C61; C81; Q15.
Ano: 2011
URL: http://purl.umn.edu/115982

Salvage the treasure of geographic information in Farm census data
Provedor de dados: 31
Autores: Gocht,   Alexander; Roder,   Norbert.
In Germany, since several decades the RAUMIS modelling system is applied for policy impact assessments to measure the impact of agriculture on the environment. A disaggregation at the municipality level with more than 9.600 administrative units, instead of currently used 316 counties, would tremendously improve the environmental impact analysis. Two sets of data are used for this purpose. The first are geo-referenced data, that are, however, incomplete with respect its coverage of production activities in agriculture. The second set is the micro census statistic itself, that has a full coverage, but data protection rules (DPR) prohibit its straightforward use. The paper show how this bottleneck can be passed to obtain a reliable modelling data set at...
Tipo: Conference Paper or Presentation
Palavras-chave: Highest Posterior Density estimator (HPD); RAUMIS; Down scaling; Research Methods/ Statistical Methods; C11; C61; C81; Q15.
Ano: 2011
URL: http://purl.umn.edu/114824

On the Theory and Practice of Water Regulation
Provedor de dados: 31
Autores: Tsur,   Yacov.
We study water regulation for a schematic water economy representing a wide range of real world situations. A water policy has inter- and intra-temporal components. The first determines the limits on extractions from the naturally replenished sources, given the stochastic nature of recharge processes associated with uncertain precipitation. The intra-temporal regulation is concerned mainly with the allocating of the extracted and produced water among the end-users. The prices that implement the optimal intra-temporal allocation are derived. Regulation issues associated with cost recovery and asymmetric information are discussed.
Tipo: Working or Discussion Paper
Palavras-chave: Scarcity; Pricing; Optimal allocation; Water economy; Resource /Energy Economics and Policy; C61; D82; Q11; Q25.
Ano: 2009
URL: http://purl.umn.edu/47173

Optimal Forest Strategies for Addressing Tradeoffs and Uncertainty in Economic Development under Old-Growth Constraints
Provedor de dados: 31
Autores: Krcmar,   Emina; Eagle,   Alison J.; van Kooten,   G. Cornelis.
In Canada, governments have historically promoted economic development in rural regions by promoting exploitation of natural resources, particularly forests. Forest resources are an economic development driver in many of the more than 80% of native communities located in forest regions. But forests also provide aboriginal people with cultural and spiritual values, and non-timber forest amenities (e.g., biodiversity, wildlife harvests for meat and fur, etc.), that are incompatible with timber exploitation. Some cultural and other amenities can only be satisfied by maintaining a certain amount of timber in an old-growth state. In that case, resource constraints might be too onerous to satisfy development needs. We employ compromise programming and fuzzy...
Tipo: Conference Paper or Presentation
Palavras-chave: Forest-dependent aboriginal communities; Boreal forest; Compromise and fuzzy programming; Sustainability and uncertainty; International Development; Resource /Energy Economics and Policy; R11; Q23; Q01; C61.
Ano: 2007
URL: http://purl.umn.edu/10251

The Economics of Wind Power: Destabilizing an Electricity Grid with Renewable Power
Provedor de dados: 31
Autores: Prescott,   Ryan; van Kooten,   G. Cornelis.
In this paper, we examine the impact policy choices, including a carbon tax, on the optimal allocation of power across different generation sources and on future investments in generating facilities. The focus in on the Alberta power grid as it is heavily dependent on fossil fuels and has only limited ties to other power grids, although the model could be extended to a larger and even multiple grids. Results indicate that, as wind penetrates the extant generating mix characterizing the grid, cost savings and emission reductions do not decline linearly, but at a decreasing rate. However, if flexibility is allowed then, as the carbon tax increases to $40 per tCO2 or above, existing coal plants start to be replaced by newly constructed wind farms and natural...
Tipo: Working or Discussion Paper
Palavras-chave: Economics of wind power; Grid system modeling; Operations research; Carbon taxes; Coal power plants; Environmental Economics and Policy; Resource /Energy Economics and Policy; C61; H23; Q40; Q42.
Ano: 2007
URL: http://purl.umn.edu/37043

Sustainability of Corn Stover Harvest for Biomass
Provedor de dados: 31
Autores: Sesmero,   Juan P.
Off-farm demand for crop residues is expected to grow as bioenergy policies become effective. Demand for residues will provide farmers with an additional source of revenue but it may also trigger losses in soil organic carbon and increases in fertilizer application. This study develops a dynamic economic model of stover harvest that permits conceptualization and quantification of these potential tradeoffs. We parameterize our model based on publicly available studies of soil biophysical relationships in the Corn Belt. Under these parameter values and 2010 corn and fertilizer prices harvesting stover is not economically convenient at prices below $53 per dry ton of stover. Results suggest that the rate of stover harvest may be quite sensitive and negatively...
Tipo: Conference Paper or Presentation
Palavras-chave: Stover supply; Biomass; Soil productivity; Soil organic carbon; Nitrogen; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy; C61; Q12; Q24; Q42; Q53.
Ano: 2011
URL: http://purl.umn.edu/103765

Structural Adjustment Processes of Farming Enterprises: The Role of Trust for Cooperation and Collaboration Strategies
Provedor de dados: 31
Autores: Albisser,   Gregor.
As a consequence of the reorientation of the Swiss as well as the European agricultural policy, prices for agricultural products drop and farmers have to reduce their production costs or will lose income. Therefore a lot of farmers have a high incentive to change their production structures. One of the most effective strategies to reduce production costs is going into cooperation and collaboration with other farmers. Therewith farmers can profit from scale effects without changing the property rights. Several case studies as well as results from modeling reveal that farmers have more income with less workload. In reality only 3% of Swiss farmers have gone into a collective farming system. Weaker forms of cooperation like sharing machinery are more common...
Tipo: Conference Paper or Presentation
Palavras-chave: Agent-based simulation; Structural change; Cooperation strategies; Collaboration; Agribusiness; Farm Management; C61; Q12; Q15.
Ano: 2007
URL: http://purl.umn.edu/6576

Dynamic regulation of nonpoint source pollution when the number of emitters is large
Provedor de dados: 31
Autores: Tsur,   Yacov; de Gorter,   Harry.
When a nonpoint source pollution process involves many polluters, each taking his own contribution to aggregate pollution to be negligible, ambient-based policies become ineffective due to lack of strategic interactions between dischargers. We offer a regulation mechanism for this case. The mechanism consists of inter-period and intra-period components. The first exploits ambient (aggregate) information to derive the optimal pollution and aggregate emission processes and the ensuing social price of emission. The intra-period mechanism takes as given the social price of emission and implements the optimal output-abatement-emission allocation across the heterogenous, privately informed firms in each time period. The mechanism gives rise to the full...
Tipo: Article
Palavras-chave: Nonpoint source pollution; Abatement; Stock externality; Dynamic regulation; Markov decision process; Asymmetric information; Crop Production/Industries; C61; D82; H23; L51; Q58.
Ano: 2012
URL: http://purl.umn.edu/122124

Measuring Eco-efficiency of Agricultural Activity in European Countries: A Malmquist Index Analysis
Provedor de dados: 31
Autores: Serrao,   Amilcar.
This paper develops an environmental performance index by applying the benefit of the doubt weighting and the Malmquist index concepts using Kuosmanen and Kortelainen’s approaches. The main difference between these approaches and other methods is that environmental performance is based on the definition of the eco-efficiency as the ratio of economic value added to the environmental damage index.  The overall environmental performance index is also decomposed into two components representing changes due to technological progress (or regress) and due to changes in relative eco-efficiency.    The dynamic environmental performance analysis is applied to 15 European agricultures from 1990 to 2004. Model results show that technical progress mostly explain...
Tipo: Conference Paper or Presentation
Palavras-chave: Benefit of the doubt weighting; Data Envelopment Analysis; Eco-efficiency; Environmental performance analysis; Malmquist Index; Agricultural Activity; Environmental Economics and Policy; Research Methods/ Statistical Methods; Q57; C43; C61.
Ano: 2008
URL: http://purl.umn.edu/6152

Vertical Integration and Operational Flexibility
Provedor de dados: 31
Autores: Michele,   Moretto; Gianpaolo,   Rossini.
The main aim of the paper is to highlight the relation between flexibility and vertical integration. To this purpose, we go through the selection of the optimal degree of vertical disintegration of a flexible firm which operates in a dynamic uncertain environment. The enterprise we model enjoys flexibility since it can switch from a certain amount of disintegration to vertical integration and viceversa. This means that the firm never loses vertical control, i.e., the ability to produce all inputs even when it buys them in the market. This sort of flexibility makes for results which are somehow contrary to the Industrial Organization recent literature and closer to the Operations Research results. In this sense we provide a bridge between the two approaches...
Tipo: Working or Discussion Paper
Palavras-chave: Vertical Integration; Outsourcing; Entry; Flexibility; L24; G 31; C61.
Ano: 2008
URL: http://purl.umn.edu/36759

CAN DOMESTICATION OF WILDLIFE LEAD TO CONSERVATION? THE ECONOMICS OF TIGER FARMING IN CHINA
Provedor de dados: 31
Autores: Abbott,   Brant; van Kooten,   G. Cornelis.
Tigers are a threatened species that might soon disappear in the wild. Not only are tigers threatened by deteriorating and declining habitat, but poachers continue to kill tigers for traditional medicine, decoration pieces and so on. Although international trade in tiger products has been banned since 1987 and domestic trade within China since 1993, tigers continue to be poached and Chinese entrepreneurs have established tiger farms in anticipation of their demise. While China desires to permit sale of tiger products from captive-bred tigers, this is opposed on the grounds that it likely encourages illegal killing. Instead, wildlife conservationists lobby for more spending on anti-poaching and trade-ban enforcement. In this study, a mathematical...
Tipo: Working or Discussion Paper
Palavras-chave: Endangered species; Extinction; Wildlife farming and bioeconomics; Environmental Economics and Policy; Q57; Q27; C61; F13.
Ano: 2009
URL: http://purl.umn.edu/46994

The Effect of Climate Change on Wetlands and Waterfowl in Western Canada: Incorporating Cropping Decisions into a Bioeconomic Model
Provedor de dados: 31
Autores: Withey,   Patrick; van Kooten,   G. Cornelis.
We extend an earlier bioeconomic model of optimal duck harvest and wetland retention in the Prairie Pothole Region of Western Canada to include cropping decisions. Instead of a single state equation, the model has two state equations representing the population dynamics of ducks and the amount of wetlands. We use the model to estimate the impact of climate change on wetlands and waterfowl, including direct climate effects as well as land use change due to biofuel policies aimed at mitigating climate change. The model predicts that climate change will reduce wetlands by 47-56 percent from historic levels. Land use change is expected to reduce wetlands by 45 percent from historic levels, whereas direct climate effects will range from a reduction of 2-11...
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomic modeling; Wetland protection; Wildlife management; Climate change; Biofuels; Environmental Economics and Policy; Q57; C61; Q25; Q54; C13; Q10; Q16.
Ano: 2011
URL: http://purl.umn.edu/117437

Implications of Expanding Bioenergy Production from Wood in British Columbia: An Application of a Regional Wood Fibre Allocation Model
Provedor de dados: 31
Autores: Stennes,   Brad; Niquidet,   Kurt; van Kooten,   G. Cornelis.
Energy has been produced from woody biomass in British Columbia for many decades, but it was used primarily within the pulp and paper sector, using residual streams from timber processing, to create heat and electricity for on-site use. More recently, there has been limited stand-alone electricity production and increasing capacity to produce wood pellets, with both using ‘waste’ from the sawmill sector. Hence, most of the low-cost feedstock sources associated with traditional timber processing is now fully employed. While previous studies model bioenergy production in isolation, we employ a transportation model of the BC forest sector with 24 regions to demonstrate that it is necessary to consider the interaction between utilization of woody feedstock for...
Tipo: Working or Discussion Paper
Palavras-chave: Bioenergy production from wood fibre; Mountain pine beetle; Competition for fibre; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q23; Q42; C61; Q54.
Ano: 2009
URL: http://purl.umn.edu/50782

Optimal Equilibria of the Best Shot Game
Provedor de dados: 31
Autores: Dall'Asta,   Luca; Pin,   Paolo; Ramezanpour,   Abolfazl.
We consider any network environment in which the “best shot game” is played. This is the case where the possible actions are only two for every node (0 and 1), and the best response for a node is 1 if and only if all her neighbors play 0. A natural application of the model is one in which the action 1 is the purchase of a good, which is locally a public good, in the sense that it will be available also to neighbors. This game will typically exhibit a great multiplicity of equilibria. Imagine a social planner whose scope is to find an optimal equilibrium, i.e. one in which the number of nodes playing 1 is minimal. To find such an equilibrium is a very hard task for any non-trivial network architecture. We propose an implementable mechanism that, in the...
Tipo: Working or Discussion Paper
Palavras-chave: Networks; Best Shot Game; Simulated Annealing; Institutional and Behavioral Economics; C61; C63; D85; H41.
Ano: 2009
URL: http://purl.umn.edu/50684

Modelos de valoracion en ambiente de incertidumbre
Provedor de dados: 31
Autores: Bellver,   Jeronimo Aznar; Martinez,   Francisco Guijarro.
Resumen En este trabajo se presentan diversos modelos de valoración en ambiente de incertidumbre que combinan información precisa e imprecisa. En el desarrollo de los mismos se ha extendido la técnica de programación por metas básica a modelos que permiten considerar intervalos en la expresión del precio o las variables explicativas del mismo, enunciando una serie de proposiciones con las que se obtiene un completo conocimiento sobre el grado de adecuación entre los valores observados en el precio y los valores estimados por la función de valoración. Así mismo, se ha formulado un índice de adecuación que permite comparar diferentes modelos obtenidos mediante la metodología propuesta.  Palabras clave: Valoración, Incertidumbre, Programación por metas con...
Tipo: Journal Article
Palavras-chave: Valuation; Uncertainty; Interval goal programming; Research Methods/ Statistical Methods; C61; G12; Q14.
Ano: 2004
URL: http://purl.umn.edu/28731

Evading Farm Support Reduction via Efficient Input Use: The Case of Greek Cotton Growers
Provedor de dados: 31
Autores: Pantzios,   Christos J.; Rozakis,   Stelios; Tzouvelekas,   Vangelis.
The present paper examines the importance that efficient resource use may have for cotton growers under the current EU policy regime. To that end, input-oriented technical and scale efficiency score for a sample of 172 cotton-growing farms are empirically quantified. The results suggest that cotton farms in the sample are not efficient mainly due to the nature of the policy regime governing the sector throughout EU. By becoming efficient, the co-responsibility levy will be reduced by 18.3% and farms may increase their profits by 50.1% on the average.
Tipo: Journal Article
Palavras-chave: Co-responsibility levy; Cotton farms; Goal programming; Greece; Scale and technical efficiency; Stochastic frontier model; Production Economics; D24; Q12; Q16; C61.
Ano: 2006
URL: http://purl.umn.edu/43787

ENDOGENOUS RECOMBINANT GROWTH
Provedor de dados: 31
Autores: Tsur,   Yacov; Zemel,   Amos.
We extend Weitzman's (1998) recombinant growth framework to include endogenous R&amp;D decisions. The analysis is carried out in the (knowledge-capital) state space by means of two characteristic curves: one is identified as a turnpike along which growing economies evolve; the other attracts stagnating economies. Sustained growth depends on a condition relating the slopes of the characteristic curves as well as on a minimal endowment requirement. A growing economy reaches the turnpike at a most rapid R&amp;D rate and evolves along it thereafter. In the long run, the rate of growth and the income shares devoted to R&amp;D, saving and consumption approach constant values that depend on the asymptotic characteristic slopes.
Tipo: Working or Discussion Paper
Palavras-chave: Knowledge generation; Combined ideas; Endogenous R&amp;D; Balanced growth; Research Methods/ Statistical Methods; C61; O31; O41.
Ano: 2006
URL: http://purl.umn.edu/7135

DYNAMIC-SPATIAL MANAGEMENT OF COASTAL AQUIFERS
Provedor de dados: 31
Autores: Kan,   Iddo; Leizarowitz,   Arie; Tsur,   Yacov.
We analyze the management of a coastal aquifer under seawater intrusion using distributed control methods. The aquifer's state is taken as the water head elevation, which varies with time and in space since extraction, natural recharge and lateral water flows vary with time and in space. The water head, in turn, induces a temporal-spatial seawater intrusion process, which changes the volume of fresh water in the aquifer. Under reasonable conditions we show that the optimal state converges to a steady state process that is constant in time. We characterize the optimal steady state process in terms of a standard control problem (in space) and offer a tractable algorithm to solve for it.
Tipo: Working or Discussion Paper
Palavras-chave: Distributed control; Groundwater; Optimal exploitation; Seawater intrusion; Resource /Energy Economics and Policy; C61; C62; Q25.
Ano: 2007
URL: http://purl.umn.edu/7131

Determination of Optimal Environmental Flow Acquisition  in Kor Basin, Doroudzan Dam
Provedor de dados: 31
Autores: Asad Falsafi Zadeh,   Neda; Sabouhi Sabouni,   Mahmood.
In current study, an irrigation examination and acquisition of environmental water in Kor River fields, that is dominated from Doroudzan dam to Bakhtegan Lake, was done by an integrated economy-environmental model. The model was considered by economic, hydrologic and agronomic components. In the economic component, an optimal harvesting of water was done using non-linear programming in two scenarios; with and without environmental water constraint. Solutions from simulation of environmental data in the hydrologic component, was used as initial data in the economic component. In the agronomic component, actual crop yield in wet, normal and dry years was determined using the relationship between crop yield and irrigation water amount. Results showed that,...
Tipo: Conference Paper or Presentation
Palavras-chave: Expected Net Income; Hydrology; Non-Linear Programming Model; Deficit Irrigation; Consumer/Household Economics; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics; Risk and Uncertainty; C32; C61; D42; D61.
Ano: 2009
URL: http://purl.umn.edu/50258

2011 Updated Arkansas Global Rice Model
Provedor de dados: 31
Autores: Wailes,   Eric J.; Chavez,   Eddie C.
The Arkansas Global Rice Model is based on a multi-country statistical simulation and econometric framework.  The model is disaggregated by five world regions: Africa, the Americas, Asia, Europe, and Oceania.  Each region includes country models which have a supply sector, a demand sector, a trade, stocks and price linkage equations.  All equations used in this model are estimated using econometric procedures or identities.  Estimates are based upon a set of explanatory variables including exogenous macroeconomic factors such as income, population, inflation rate, technology development, and especially, government determined policy variables which reflect the various mechanisms by which countries intervene in their rice sector economy.  Individual country...
Tipo: Report
Palavras-chave: Rice; Trade model; Policy; Agricultural and Food Policy; Research and Development/Tech Change/Emerging Technologies; CO2; C61; F11; F14; Q17; Q18.
Ano: 2011
URL: http://purl.umn.edu/102650

MUNICIPALITY DISAGGREGATION OF GERMAN'S AGRICULTURAL SECTOR MODEL RAUMIS
Provedor de dados: 31
Autores: Roeder,   Norbert; Gocht,   Alexander.
Since several decades the RAUMIS modelling system is applied for policy impact assessments to measure the impact of agriculture on the environment. A disaggregation at the municipality level with more than 9.000 administrative units, instead of currently used 316 counties, would tremendously improve the environmental impact analysis. Two sets of data are used for this purpose. The first are geo-referenced data, that are, however, incomplete with respect its coverage of production activities in agriculture. The second set is the micro census statistic itself, that has a full coverage, but data protection rules (DPR) prohibit its straightforward use. The paper show how this bottleneck can be passed to obtain a reliable modelling data set at municipality...
Tipo: Conference Paper or Presentation
Palavras-chave: Highest Posterior Density estimator (HPD); RAUMIS; Down scaling; Agricultural and Food Policy; C11; C61; C81; Q15.
Ano: 2011
URL: http://purl.umn.edu/99248

“Waiting for Godot”- Restructuring on Small Family Farms
Provedor de dados: 31
Autores: Jack,   Claire G.; Moss,   Joan E.; Wallace,   Michael T.
This paper examines the extent to which favourable off-farm labour market conditions coupled with growth in land values have contributed to the observed resilience of small scale family farms. We use data from Northern Ireland and employ farm household optimisation models to analyse household decision making processes that contribute to the observed inertia in farm structure. The analysis indicates that farm household behaviour is influenced not just by current farm income, but also expected capital asset returns. Increased wealth, associated with continuing land ownership, gives rise to the proposition that the link between off-farm incomes, increased land values and remaining in farming may be associated with farmers pursuing wealth maximizing...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm households; Resilience; Wealth accumulation; Off-farm income; Consumer/Household Economics; Productivity Analysis; C61; Q12.
Ano: 2009
URL: http://purl.umn.edu/52835

Stochastic Utility-Efficient Programming of Organic Dairy Farms
Provedor de dados: 31
Autores: Flaten,   Ola; Lien,   Gudbrand D.
Opportunities to make sequential decisions and adjust activities as a season progresses and more information becomes available characterize the farm management process.  In this paper, we present a discrete stochastic two-stage utility efficient programming model of organic dairy farms, which includes risk aversion in the decision maker's objective function as well as both embedded risk (stochastic programming with resource) and non-embedded risk (stochastic programming without recourse).  Historical farm accountancy data and subjective judgments were combined to assess the nature of the uncertainty that affects the possible consequences of the decisions.  The programming model was used within a stochastic dominance framework to examine optimal strategies...
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Risk analysis; Stochastic programming; Stochastic dominance; Organic farming; Livestock Production/Industries; Q12; C61.
Ano: 2005
URL: http://purl.umn.edu/24743

Mixed Crop Livestock Farming Incorporating Agroforestry Orchards Facing the New Cap
Provedor de dados: 31
Autores: Ducros,   Denis; Kephaliacos,   Charilaos; Ridier,   Aude.
In the context of the new CAP, decoupling subsidies from production should incite farmers to reorganize their production systems, particularly through diversification opportunities. In this paper we focus our analysis on the conditions that could permit the development of extensive orchards by modelling mixed crop livestock farms, which incorporate orchards. A mathematical programming model is built to simulate various intensification levels characterizing different technical pathways within the different farm activities (cattle breeding, forage fields, arboriculture). This model also enables us to take into account some environmental indicators related to these pathways. Moreover, the method illustrates technical complementarities existing within the...
Tipo: Conference Paper or Presentation
Palavras-chave: Decoupling; Diversification; Agroforestry orchards; Joint production; Mathematical programming; Agribusiness; C61; D24; Q12; Q21.
Ano: 2005
URL: http://purl.umn.edu/24532

Análisis de alternativas para la eliminación de la sobreexplotación de acuíferos en el Valle de Guadalentín
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Guillem,   Amanda; Martinez-Granados,   David.
In this paper we analyse the economic impact of alternative water management instruments that allow addressing the problem of non-renewable groundwater pumping in the aquifers of the Guadalentín Valley (southeast Spain). Their impact is assessed using a partial equilibrium mathematical programming model that maximises the farm net margin resulting from the use of the available water resources for irrigation in the area. Our results show that the buyback of groundwater pumping rights is the option with the greatest public budgetary cost and economic impact. On the contrary, the combination of an environmental tax on groundwater pumping and the substitution of groundwater by subsidised desalinised water allow eliminating aquifer overdraft in the area while...
Tipo: Article
Palavras-chave: Groundwater; Water economics; Water demand; Mathematical programming; Irrigation; Agricultural and Food Policy; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy; Q25; C61.
Ano: 2011
URL: http://purl.umn.edu/120197

Optimal Structure of Farms in a Region - A Modeling Approach
Provedor de dados: 31
Autores: Majewski,   Edward; Was,   Adam.
In the paper the regional, optimization model of agriculture and its use for predicting probable reactions of farmers and assessing the impact of the adaptation processes in the farming sector to agricultural policy changes and macroeconomic developments are presented. Two-phases modeling approach has been applied, with the use of linear programming, static optimization models – a farm model, used to optimize the production structure of the farms typical for the region, and an agricultural sector model, used to determine the optimal farm and production structures within a region. An attempt have been made to incorporate in the model both – micro and macroeconomic parameters. The result show, that different scenarios adjustments in farming sector in the...
Tipo: Conference Paper or Presentation
Palavras-chave: Regional model of agriculture; Optimization; Farm strucure; Agribusiness; C61.
Ano: 2005
URL: http://purl.umn.edu/24571

Tradable Substitution Rights: Simulation of the Cost-Efficiency of a Nitrogen Reduction in the Pig Finishing Sector
Provedor de dados: 31
Autores: Carlier,   Peter Jan; Lauwers,   Ludwig H.; Mathijs,   Erik.
To comply with the European Nitrate Directive, the Flemish manure policy has been elaborated mainly on the base of command and control measures (maximum fertilisation limits etc.). In literature, however, tradable permits are described as a cost efficient and effective instrument. Applied to nutrient emission they might offer an alternative for the current, expensive manure policy. In this publication both policy instruments are compared by means of simulation models. Based on accountacy data from 190 pig finishing farms, it is shown that tradable rights may result in cost savings of over 88%, compared to the most cost efficient command and control model. This result indicates that tradable permits at least need to be considered as a plausible policy...
Tipo: Conference Paper or Presentation
Palavras-chave: Tradable permits; Agriculture; Command and control; Nitrogen; Linear programming; Livestock Production/Industries; C61; D23; H23; Q58; Q52.
Ano: 2005
URL: http://purl.umn.edu/24746

An Agro-Economic Production Model for a Middle European River Basin - First Results of CAP Reform Scenario Calculations
Provedor de dados: 31
Autores: Henseler,   Martin; Krimly,   Tatjana; Wirsig,   Alexander.
ACRE is an Agro-eConomic model for agricultural pRoduction on rEgional level. Based on an extension of Positive Mathematical Programming (PMP) this model was developed as a decision tool for politics with respect to questions of global change- and political scenarios. Currently, ACRE is applied in the RIVERTWIN-Neckar project and politic scenarios of the CAP reform 2003 were calculated. This paper introduces ACRE, its theoretical framework, and the first results of political scenario calculations, which where done for the Neckar river basin.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural production model; Regional model; Interdisciplinary projects; CAP reform 2003; Positive Mathematical Programming; Agricultural and Food Policy; E23; Q15; Q21; Q18; C61.
Ano: 2006
URL: http://purl.umn.edu/25612

Choice of Optimal Planting and Marketing Decisions for Fresh Vegetable Producers: A Mathematical Programming Approach
Provedor de dados: 31
Autores: Vassalos,   Michael; Dillon,   Carl R.; Coolong,   Tim.
This study combines whole farm economic analysis with biophysical simulation techniques in order to achieve a twofold objective. First, the study seeks to develop a multiple enterprise vegetable farm model with a production and marketing decision interface and, second, to determine optimal production practices for Kentucky vegetable growers. Three vegetable crops are examined: tomatoes, bell peppers and sweet corn. The findings indicate that the risk associated with vegetable production can be significantly mitigated with diversification of production mix and with a greater number of transplanting dates. However, this reduction in risk comes at a high cost in terms of expected net returns.
Tipo: Presentation
Palavras-chave: Vegetable production; Mean-variance; Biophysical simulation; Farm management; Farm Management; C61; C63; D81.
Ano: 2012
URL: http://purl.umn.edu/120016

A Microeconomic Model for Subsidies Allocation:  the Case of Belarus
Provedor de dados: 31
Autores: Svetlov,   Nikolai M.; Kazakevich,   Iryna A.
The paper develops a microeconomic methodological framework that allows approaching subsidy allocation across the types of assets and impact of subsidies on agricultural outputs and profits. The methodology is based on a non-parametric production frontier estimation. The empirical application is made to 1084 Belarusian corporate farms. The results suggest targeting governmental support at grain and milk production. In this case, 4.14 trillion Belarusian roubles of subsidies increase the overall profit of the sample farms by 1.46 trillion. In the case of targeting, the farms with higher overall efficiency are more sensitive to the support and are able to absorb larger amount of subsidies. The opposite is true in the absence of targeting.
Tipo: Conference Paper or Presentation
Palavras-chave: Microeconomic model; Data envelopment; Subsidies; Belarus; Agricultural and Food Policy; Institutional and Behavioral Economics; Political Economy; K18; C61.
Ano: 2010
URL: http://purl.umn.edu/90826

MILK QUOTAS ABOLISHMENT AND SIMPLIFICATION OF THE SINGLE PAYMENT SCHEME: IMPLICATIONS ON DAIRY FARMERS’ PRODUCTIVE STRATEGY IN THE WEST OF FRANCE
Provedor de dados: 31
Autores: Lelyon,   Baptiste; Chatellier,   Vincent; Daniel,   Karine.
Paper removed at request of authors - 06/23/09.
Tipo: Conference Paper or Presentation
Palavras-chave: Dairy farm; CAP Health Check; Abolition of milk quotas; Price volatility; Bioeconomic model; Utility efficient programming; Agricultural and Food Policy; Research Methods/ Statistical Methods; Q12; Q18; C61.
Ano: 2008
URL: http://purl.umn.edu/44795

Subsurface Drip Irrigation Versus Center-Pivot Sprinkler for Applying Swine Effluent to Corn
Provedor de dados: 31
Autores: Carreira,   Rita I.; Stoecker,   Arthur L.; Epplin,   Francis M.; Hattey,   Jeffory A.; Kizer,   Michael A.
A risk-averse irrigated corn producer would be better off choosing the more expensive subsurface drip irrigation (SDI) over center-pivot sprinkler (CPS), given limited aquifer life and swine effluent and urea fertilization. A stochastic optimization using EPIC data maximized expected utility of 100 years' worth of net revenues for a quarter section. Phosphorus accumulation was more likely with the CPS than with the SDI but soil nitrogen was constant under both systems. SDI conserves more water than CPS per acre but depletes the aquifer faster because a greater area is irrigated. These results were invariant in the sensitivity analysis.
Tipo: Journal Article
Palavras-chave: Aquifer depletion; Center-pivot sprinkler irrigation; Certainty equivalent; Corn irrigation; Mathematical programming; Risk; Stochastic optimization; Subsurface drip irrigation; Crop Production/Industries; C61; C65; Q12; Q30; Q53.
Ano: 2006
URL: http://purl.umn.edu/43783

Productividad, disposicion al pago y eficiencia tecnica en el uso del agua: la horticultura intensiva de la Region de Murcia
Provedor de dados: 31
Autores: Colino Sueiras,   Jose; Martinez Paz,   Jose Miguel.
RESUMEN Este trabajo presenta los resultados derivados de un estudio sobre eficiencia y productividad del agua en la horticultura intensiva litoral del sureste español. Tras la caracterización de esta actividad productiva, se analizan 230 encuestas directas a horticultores y 50 entrevistas a técnicos agrarios realizadas en la campaña 2004/2005, calculando la productividad aparente y los precios de nivelación y cierre para los cultivos más característicos. Seguidamente se estima la disposición al pago por el agua de los horticultores, la cual muestra una relación positiva con los niveles de eficiencia técnica previamente estimados para este sistema productivo.  ABSTRACT This work presents some results derived from a study on efficiency and productivity of...
Tipo: Journal Article
Palavras-chave: Water; Intensive horticulture; Efficiency; Willigness to pay; Agua; Horticultura intensiva; Eficiencia tecnica; Disposicion al pago; Resource /Energy Economics and Policy; Q12; C61.
Ano: 2007
URL: http://purl.umn.edu/7058

Quota Trading and Profitability: Theoretical Models and Applications to Danish Fisheries
Provedor de dados: 31
Autores: Andersen,   Jesper Levring; Bogetoft,   Peter.
Using Data Envelopment Analysis (DEA), we provide a framework to analyze the potential gains from quota trading. We compare the industry profit and structure before and after a free trade reallocation of production quotas. The effects of tradable production quotas depend on several technological and behavioral characteristics, including the ability to learn best practice (catch-up) and the ability to change the input and output composition (mix). To illustrate the usefulness of our approach, we analyze a dataset from the Danish fishery. We study the industry profit and structure under each of four sets of technological and behavioral characteristics.
Tipo: Working or Discussion Paper
Palavras-chave: Data Envelopment Analysis (DEA); Individual Transferable Quotas (ITQ); Reallocation; Technical efficiency; Allocative efficiency; Fishery; Agribusiness; C61; L51; Q22; Q28.
Ano: 2003
URL: http://purl.umn.edu/24180

Aggregation and Calibration of Agricultural Sector Models Through Crop Mix Restrictions and Marginal Profit Adjustments
Provedor de dados: 31
Autores: Wiborg,   Torben; McCarl,   Bruce A.; Rasmussen,   Svend; Schneider,   Uwe A.
All agricultural sector models must deal with aggregation and calibration somehow. The aggregation problem involves treating a group of producers as if they all responded in the same way as a single representative unit. The calibration problem concerns making a model reproduce as closely as possible an empirically observed set of decision maker actions. This paper shows how both calibration and aggregation are addressed through crop mix restrictions combined with marginal profit adjust-ments.
Tipo: Conference Paper or Presentation
Palavras-chave: Mathematical programming; Aggregation; Calibration; Crop mix; Marginal cost; Agricultural sector model; Agribusiness; C6; C61; Q1; Q11; Q17; Q18; R12; R13; R14.
Ano: 2005
URL: http://purl.umn.edu/24567

Measuring Technical Efficiency of Dairy Farms with Imprecise Data: A Fuzzy Data Envelopment Analysis Approach
Provedor de dados: 31
Autores: Mugera,   Amin W.
This article integrates fuzzy set theory in Data Envelopment Analysis (DEA) framework to compute technical efficiency scores when input and output data are imprecise. The underlying assumption in convectional DEA is that inputs and outputs data are measured with precision.  However, production agriculture takes place in an uncertain environment and, in some situations, input and output data may be imprecise.  We present an approach of measuring efficiency when data is known to lie within specified intervals and empirically illustrate this approach using a group of 34 dairy producers in Pennsylvania.  Compared to the convectional DEA scores that are point estimates, the computed fuzzy efficiency scores allow the decision maker to trace the performance of a...
Tipo: Conference Paper or Presentation
Palavras-chave: Fuzzy set theory; Data Envelopment Analysis; Membership function; Α-cut level; Technical efficiency; Farm Management; Production Economics; Productivity Analysis; Research Methods/ Statistical Methods; Risk and Uncertainty; D24; Q12; C02; C44; C61.
Ano: 2011
URL: http://purl.umn.edu/103251

A Nonparametric Kernel Representation of the Agricultural Production Function: Implications for Economic Measures of Technology
Provedor de dados: 31
Autores: Livanis,   Grigorios T.; Salois,   Matthew J.; Moss,   Charles B.
The issue of production function estimation has received recent attention, particularly in agricultural economics with the advent of precision farming. Yet, the evidence to date is far from unanimous on the proper form of the production function. This paper reexamines the use of the primal production function framework using nonparametric regression techniques.  Specifically, the paper demonstrates how a nonparametric regression based on a kernel density estimator can be used to estimate a production function using data on corn production from Illinois and Indiana. Nonparametric results are compared to common parametric specifications using the Nadaraya-Watson kernel regression estimator. The parametric and nonparametric forms are also compared in terms of...
Tipo: Conference Paper or Presentation
Palavras-chave: Nonparametric regression; Nonparametric derivatives; Gaussian kernel; Optimization techniques; Production function; Production Economics; C14; C15; C16; C61; Q12.
Ano: 2009
URL: http://purl.umn.edu/51063

Riceflow: a Multi-region, Multi-product, Spatial Partial Equilibrium Model of the World Rice Economy
Provedor de dados: 31
Autores: Durand-Morat,   Alvaro; Wailes,   Eric J.
Tipo: Working or Discussion Paper
Palavras-chave: Rice; Spatial trade model; Bilateral trade; Policy; Agricultural and Food Policy; International Relations/Trade; Research Methods/ Statistical Methods; C02; C61; F11; F14; Q17; Q18.
Ano: 2010
URL: http://purl.umn.edu/92010

Potencial da logística ferroviária para exportação de açúcar em São Paulo: recomendações de localização para armazéns intermodais
Provedor de dados: 31
Autores: Oliveira,   Ana Maria Kefalas; Caixeta Filho,   Jose Vicente.
This study analyzes the best warehousing location for sugar exportation in the state of Sao Paulo using the railway transportation. A mixed integer programming model was developed and its results indicate some trends for localization and capacity of these warehouses. Four scenarios were elaborated and they showed high competitiveness of the intermodal transport compared to the alternative of road transportation from the mill to the port. It was also confirmed that there is a possibility to increase the market share of the railway transportation for Sao Paulo’s sugar exports.
Tipo: Journal Article
Palavras-chave: Intermodal transportation; Railway transport; Sugar market.; Agribusiness; C61; Q13.
Ano: 2007
URL: http://purl.umn.edu/61919

Modeling of Structural Adjustment Processes of Farming Enterprises: The Need for Implementation of Cooperation and Collaboration Strategies
Provedor de dados: 31
Autores: Albisser,   Gregor; Lehmann,   Bernard.
The research objective is to shed light on the structural adjustment process of farming enterprises in Switzerland. To this end, an analytical tool is developed which allows us to identify the most important influencing factors and to estimate in advance their effects on the structural adjustment process. The resulting structures will be compared with the relevant goals of the (agricultural) policy in order to draw conclusions about the effectiveness of the adjustment process. Using scenario techniques combined with an agent-based simulation, the influencing factors are varied to investigate alternative options like cooperation and collaboration strategies for improving the effectiveness with respect to the social, ecological and economic goals.
Tipo: Conference Paper or Presentation
Palavras-chave: Agent-based simulation; Structural change; Cooperation strategies; Collaboration; Agricultural Finance; C61; Q12; Q15.
Ano: 2006
URL: http://purl.umn.edu/25250

An attempt to modelling revenue insurance schemes at the farm level by means of Positive Mathematical Programming
Provedor de dados: 31
Autores: Severini,   Simone; Cortignani,   Raffaele.
Farmers face increasing income uncertainty and the debate is growing on the role of insurance schemes and of public support in this field. This paper applies a PMP modelling approach that takes into explicit consideration risk aversion behaviour to test its applicability to evaluating the potential impact of insurance schemes. This is done by introducing a revenue insurance scheme into a model developed on a small group of crop farms in Italy. The paper represents a preliminary assessment of the soundness of the proposed approach. It identifies some limitations that should be overcome to improve the proposed approach. Despite these limitations, it seems a useful tool to investigate the impact of insurance schemes and policy relevant parameters such as...
Tipo: Conference Paper or Presentation
Palavras-chave: Insurance schemes; PMP; Farmers’ behaviour; Risk aversion; Agricultural and Food Policy; Q12; C61; Q18.
Ano: 2011
URL: http://purl.umn.edu/99431

Organic Productions and Capacity to Respond to Market Signals and Policies: An Empirical Analysis of a Sample of FADN Farms
Provedor de dados: 31
Autores: Arfini,   Filippo; Donati,   Michele.
The paper approaches the problem of assessing the impacts of market and rural development policies oriented at stimulating the growth and spread of organic farming in Italy. From the methodological perspective, an innovative formulation of Pmp is presented and discussed; it is applied to a set of farms belonging to the FADN sample, specifically located in Emilia Romagna and Sicily. The Pmp model has the capacity to estimate the impact of policies on crops not yet present at the time the farm data was recorded. From the empirical standpoint, various sets of policies are simulated on cluster of farms both conventional and in course of conversion in organic production.
Tipo: Conference Paper or Presentation
Palavras-chave: Organic products; PMP; CAP; Farm Management; Q12; C61; Q18; C38.
Ano: 2011
URL: http://purl.umn.edu/114229

The Future of European Agriculture - An Updated Outlook
Provedor de dados: 31
Autores: Isoard,   Stephane; Witzke,   Heinz Peter.
This paper reports the results of a European agricultural outlook exercise that updates former studies in three ways, i.e. in terms of timeframes, spatial coverage and policy context.  This updated European agricultural outlook constitutes a key component of the forthcoming 'State of the Environment and Outlook report' of the European Environment Agency (EEA).  Both activity variables and environmental indicators are reported for a baseline projection and alternative scenarios.  The main findings include the following: European harvested land is expected to continue to be primarily used to fodder activities and production of cereals (80% of total area); yields increase is projected to be the main source of production growth in Europe over the next 20...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural outlook; European agricultural policy; Environment; Agribusiness; C61; Q18; Q21.
Ano: 2005
URL: http://purl.umn.edu/24500

Economic Impacts of EPA's Manure Application Regulations on Dairy Farms with Lagoon Liquid Systems in the Southwest Region
Provedor de dados: 31
Autores: Huang,   Wen-Yuan; Magleby,   Richard S.; Christensen,   Lee A.
EPA's new restrictions on land application of manure nutrients by concentrated animal feeding operations (CAFOs) could decrease the net return of 6-17% of the medium and large dairy farms with lagoon systems in the southwestern United States.  Many of the other dairy CAFOs in the region could achieve higher net income under the restrictions if they reduce feed costs by better utilizing manure and expanding homegrown feed production.
Tipo: Journal Article
Palavras-chave: CAFO; Dairy farms; Land application; Manure regulations; Nutrient management; Environmental Economics and Policy; Livestock Production/Industries; C61; Q12; Q52; Q58.
Ano: 2005
URL: http://purl.umn.edu/43993

O mercado de carne bovina no Brasil: os efeitos da eliminação das barreiras tarifárias e não-tarifárias
Provedor de dados: 31
Autores: Bender Filho,   Reisoli; Alvim,   Augusto Mussi.
This paper analyses the possible impacts of tariffs and nontariffs barriers elimination on beef market in Brazil. To evaluate the effects of free trade is used a spatial model formulated as Mixed Complementary Problem (MCP). We simulate four sceneries to achieve this purpose: the first simulates the elimination of all trade barriers in a multilateral scope; the second simulates the free trade area creation between Mercosur and EU countries. The third simulates the free trade area formation between the America countries (FTAA); and the fourth considers the elimination of Foot and Mouth Disease in Mercosur countries. In the beef market it is not enough eliminate the tariffs barriers to stimulate the beef production and exportation in Brazil. The major gains...
Tipo: Journal Article
Palavras-chave: Beef market; Trade agreements; Non-tariffs barriers.; Agribusiness; C61; F13; F15.
Ano: 2008
URL: http://purl.umn.edu/61198

Modeling farmer participation to a revenue insurance scheme by means of Positive Mathematical Programming
Provedor de dados: 31
Autores: Severini,   Simone; Cortignani,   Raffaele.
European farmers face increasing income uncertainty and the debate is growing on the role of insurance schemes and of public support in this field. This debate is further stimulated by the perspective of introducing instruments to cope with risk also in the Common Agricultural Policy. Therefore, there is a need for empirical analysis and tools aimed at providing empirical evidences on this subject. This paper applies a PMP modelling approach that takes into explicit consideration risk aversion behaviour to test the possibility to use it to assess the implications of participating in a insurance scheme. This is done by introducing a revenue insurance scheme into a model developed on a small group of crop farms in Italy. In particular, a quadratic mix...
Tipo: Conference Paper or Presentation
Palavras-chave: Insurance schemes; PMP; Farmers’ participation; Risk aversion; Non-linear mix-integer programming; Farm Management; Risk and Uncertainty; Q12; C61; Q18.
Ano: 2011
URL: http://purl.umn.edu/116001

CLIMATE CHANGE IMPACTS ON US AGRICULTURE
Provedor de dados: 31
Autores: Beach,   Robert H.; Thomson,   Allison M.; McCarl,   Bruce A.
There is general consensus in the scientific literature that human-induced climate change has taken place and will continue to do so over the next century. The Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change concludes with “very high confidence” that anthropogenic activities such as fossil fuel burning and deforestation have affected the global climate. The AR4 also indicates that global average temperatures are expected to increase by another 1.1°C to 5.4°C by 2100, depending on the increase in atmospheric concentrations of greenhouse gases that takes place during this time. Increasing atmospheric carbon dioxide levels, temperature increases, altered precipitation patterns and other factors influenced by climate have...
Tipo: Conference Paper or Presentation
Palavras-chave: Climate change; Crop yields; EPIC; FASOM; Crop Production/Industries; Environmental Economics and Policy; International Relations/Trade; Land Economics/Use; Resource /Energy Economics and Policy; C61; Q18; Q54.
Ano: 2010
URL: http://purl.umn.edu/91393

Multicriteria analysis on effective financing of agri-environmental measures and conflicts between environmental objectives
Provedor de dados: 31
Autores: Ziolkowska,   Jadwiga.
The main objective of the paper is to investigate effective financing scenarios for agri-environmental measures with regard to the environmental benefit, considering regional policy priorities. By means of the Analytic Hierarchy Process (AHP) and a Linear Programming (LP) approach we conduct multicriteria analysis and investigate conflicts between environmental objectives as well as their influence on financing scenarios for agri-environmental measures. The analysis is based on an explorative case study conducted in Poland in the Subcarpathia region and on interviews with agricultural experts. The results show that the budget allocation for agri-environmental measures is considerably dependent on preferences given to environmental objectives within...
Tipo: Conference Paper or Presentation
Palavras-chave: Agri-environmental policy; Evaluation; Environmental protection; Agricultural and Food Policy; Environmental Economics and Policy; Q51; Q57; C61.
Ano: 2009
URL: http://purl.umn.edu/51338

MODELING ALTERNATIVE POLICIES FOR GHG MITIGATION FROM FORESTRY AND AGRICULTURE
Provedor de dados: 31
Autores: Beach,   Robert H.; Daigneault,   Adam J.; McCarl,   Bruce A.; Rose,   Steven K.
A key consideration for development of energy and climate policy affecting the forestry and agricultural sectors is that the selection of specific mechanisms implemented to achieve bioenergy production and/or greenhouse gas (GHG) mitigation targets may have substantial effects on landowner incentives to adopt alternative practices. For instance, the prices of allowances and offsets are expected to diverge under some policies being considered where there is a binding cap on the quantity of offsets from the agricultural and forest sectors. In addition, provisions that limit or exclude specific practices from receiving carbon payments will affect the quantity and cost of GHG mitigation opportunities available. In this study, the recently updated Forest and...
Tipo: Conference Paper or Presentation
Palavras-chave: Climate policy; Energy policy; FASOMGHG; GHG mitigation; Agricultural and Food Policy; Environmental Economics and Policy; Resource /Energy Economics and Policy; C61; Q42; Q54.
Ano: 2010
URL: http://purl.umn.edu/91394

An Integrated Assessment of Climate Change, Air Pollution, and Energy Security Policy
Provedor de dados: 31
Autores: Bollen,   Johannes; Hers,   Sebastiaan; van der Zwaan,   Bob.
This article presents an integrated assessment of climate change, air pollution, and energy security policy. Basis of our analysis is the MERGE model, designed to study the interaction between the global economy, energy use, and the impacts of climate change. For our purposes we expanded MERGE with expressions that quantify damages incurred to regional economies as a result of air pollution and lack of energy security. One of the main findings of our cost-benefit analysis is that energy security policy alone does not decrease the use of oil: global oil consumption is only delayed by several decades and oil reserves are still practically depleted before the end of the 21st century. If, on the other hand, energy security policy is integrated with optimal...
Tipo: Working or Discussion Paper
Palavras-chave: Climate Change; Air Pollution; Energy Security; Cost-Benefit Analysis; Environmental Economics and Policy; H21; D58; C61; O33; Q40.
Ano: 2009
URL: http://purl.umn.edu/55332

Profit and Variance Analysis of Cotton Production Technologies and Rotation Crops in Georgia
Provedor de dados: 31
Autores: Flanders,   Archie; White,   Fred C.; Shurley,   W. Donald; Brown,   Steve M.
Genetically modified cotton varieties have the potential for increasing returns and/or decreasing labor requirements.  A nonlinear optimization model is applied to a whole farm analysis for evaluating cotton production technologies.  This model maximizes farm utility, composed of expected returns and their variability, at various risk aversion levels in order to evaluate cotton production technologies.  Results show that while conventional cotton maximizes utility in a risk-neutral situation, transgenic cotton varieties entered into the optimal solutions as higher levels of risk aversion were considered.
Tipo: Journal Article
Palavras-chave: Cotton production technologies; Mathematical optimization; Risk aversion; Whole farm analysis; C61; Q16.
Ano: 2003
URL: http://purl.umn.edu/43204

Welfare distribution between EU Member States through different national decoupling options. Implications for Spain
Provedor de dados: 31
Autores: Dominguez,   Ignacio Perez; Wieck,   Christine.
SUMMARY: This paper makes use of an agricultural sector model to analyse welfare effects derived from different national implementation options of the CAP Reform 2003. It shows that agricultural prices developed more favourable in a full premium decoupling scenario, since agricultural production declines more pronounced compared to a partial decoupling scenario. The use of the partial decoupling mechanism helps Member States to distribute income into less favoured areas but is not the optimal policy choice. However, if other Member States follow the same path of reform, a "prisoner's dilemma" will most likely be observed: partial decoupling appears as the preferred option for individual Member States, since high domestic production and high producer prices...
Tipo: Journal Article
Palavras-chave: Common Agricultural Policy; Partial equilibrium analysis; Modelling; Decoupling; Welfare analysis.; Agricultural and Food Policy; C61; D60; Q18.
Ano: 2006
URL: http://purl.umn.edu/8005

Managing Water Shortages in the Western Electricity Grids
Provedor de dados: 31
Autores: Scorah,   Hugh; Sopinka,   Amy; van Kooten,   G. Cornelis.
British Columbia’s electricity grid is comprised primarily of hydroelectric generating assets. The ability to store water in reservoirs is a significant advantage for the province allowing it to import from Alberta when prices are favourable. Alberta, has a heavily fossil-fuel based electricity portfolio, but has seen substantial growth in its wind energy capacity. However this variable energy technology impacts the province’s grid operations. Wind energy is both variable and uncertainty. However, wind energy in Alberta can be stored via BC’s reservoir systems. In this paper, we examine the extent that drought impacts the both overall operating costs as well as the cost of reducing CO2 emissions. We model the Alberta and BC interconnected grids varying...
Tipo: Working or Discussion Paper
Palavras-chave: Wind power; Carbon costs; Electrical grids; Mathematical programming; Resource /Energy Economics and Policy; Q54; Q41; C61.
Ano: 2010
URL: http://purl.umn.edu/59701

Semi-subsistence Farm Households in Central and South-eastern Europe: Current State and Future Perspectives
Provedor de dados: 31
Autores: Fritzsch,   Jana; Wegener,   Stefan; Buchenrieder,   Gertrud; Curtiss,   Jarmila; Gomez y Paloma,   Sergio.
The European Union (EU) introduced a special transitional semi-subsistence measure to promote the smallest agricultural producers, so-called semi-subsistence farm households (SFHs) in the enlargement process. An outlook on the future of SFHs requires comprehensive and reliable information on the phenomenon and the impact of policy measures on their development. Therefore, a survey using a standardised questionnaire was conducted in Poland (175 households), Romania (185 households), and Bulgaria (184 households) from July to September 2007. In a first step, four major types of SFHs could be identified by means of cluster analysis: (i) rural diversifiers, (ii) rural pensioners, (iii) farmers, and (iv) rural newcomers. In a second step, a multiobjective...
Tipo: Conference Paper or Presentation
Palavras-chave: Semi-subsistence; Policy analysis; Transition countries; Multiobjective linear programming; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Research Methods/ Statistical Methods; C61; P27; Q12.
Ano: 2009
URL: http://purl.umn.edu/51444

Optimal intertemporal investment in Australian agriculture: An empirical investigation
Provedor de dados: 31
Autores: Agbola,   Frank W.
This paper empirically investigates optimal intertemporal investment behaviour of farmers in Australia. The dynamic investment model is estimated using pooled crosssectional and time-series farm survey data spanning the period 1979-1993. The model captures intertemporal investment behaviour of farmers, including independent and instantaneous adjustment decisions. Empirical test results indicate that labour, capital, sheep numbers and cattle numbers adjust sluggishly towards their long-run equilibrium levels. Results provide empirical evidence to indicate that adjustment problem is characteristic of production in agricultural zones Australia.
Tipo: Journal Article
Palavras-chave: Australia; Agricultural zones; Optimal intertemporal investment model; Quaxi-fixity; Adjustment costs; Farm Management; Research Methods/ Statistical Methods; C33; C12; C13; C61.
Ano: 2005
URL: http://purl.umn.edu/44094

Influencia social y sostenibilidad en el uso de recursos renovables
Provedor de dados: 31
Autores: Almudi,   Isabel; Choliz,   Julio Sanchez.
En este trabajo presentamos un modelo en el que las actividades extractivas referidas a un recurso natural renovable, si son abusivas, generan algún tipo de reacción social que modifica las preferencias sociales. Esta modificación es tenida en cuenta por el planificador a la hora de decidir cual es la asignación intertemporal óptima entre consumo y stock del recurso. Bajo estas nuevas condiciones, nos preguntamos cómo cambia el stock del recurso natural en el estado estacionario y qué puede decirse acerca de la posibilidad de sobreexplotación en comparación con los modelos tradicionales en los que no se considera reacción social. Los resultados obtenidos muestran que bajo estas nuevas condiciones el stock del estado estacionario aumenta y el comportamiento...
Tipo: Journal Article
Palavras-chave: Renewable Resources; Sustainability; Environmental Information; Overuse; Resource /Energy Economics and Policy; Q50; Q20; C61.
Ano: 2006
URL: http://purl.umn.edu/8003

A Participatory Approach to Assess the Effectiveness of Responses to Cope with Flood Risk
Provedor de dados: 31
Autores: Ceccato,   Lucia; Giannini,   Valentina; Giupponi,   Carlo.
This work illustrates the preliminary findings of a participatory research process aimed at identifying responses for sustainable water management in a climate change perspective, in two river basins in Europe and Asia. The paper describes the methodology implemented through local workshops, aimed at eliciting and evaluating possible responses to flood risk. Participatory workshops allowed for the identification of four categories of possible responses and a set of nine evaluation criteria, three for each of the three pillars of sustainable development. The main outcome of such activities consists in the ranking of broad response categories instrumental to the objective of the Brahmatwinn research project, i.e. the identification of Integrated Water...
Tipo: Working or Discussion Paper
Palavras-chave: Participatory Process; Climate Change; Flood Risk; Decision Support System; Multi Criteria Analysis; MCA; Eliciting Responses; Evaluating Responses; Integrated Water Resources Management; IWRM; Mulino Decision Support System; MDSS; Environmental Economics and Policy; C61; Q01; Q54; Q56; Q58.
Ano: 2010
URL: http://purl.umn.edu/60662

Finding Maxmin Allocations in Cooperative and Competitive Fair Division
Provedor de dados: 31
Autores: Dall'Aglio,   Marco; Di Luca,   Camilla.
We consider upper and lower bounds for maxmin allocations of a completely divisible good in both competitive and cooperative strategic contexts. We then derive a subgradient algorithm to compute the exact value up to any fixed degree of precision.
Tipo: Working Paper
Palavras-chave: Fair Division; Maxmin Allocation; Kalai Bargaining Solution; Cooperative Game Theory; Research Methods/ Statistical Methods; D63; C61; C71; C78.
Ano: 2011
URL: http://purl.umn.edu/120020

Internationaler Handel und multifunktionale Landwirtschaft : Ein Agrarsektormodell zur Analyse Politischer Optionen und Entscheidungsunterstutzung
Provedor de dados: 31
Autores: Weber,   Gerald.
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural sector; Policy analysis; Agricultural trade; Multifunctionality; External effects; Taxes; Subsidies; Sector modeling; International Relations/Trade; C61; C69; D62; H23; H41; Q71; Q18.
Ano: 2003
URL: http://purl.umn.edu/18824

Policy Design as an Irreversible Investment Under Uncertainty: Norwegian Agriculture and the WTO
Provedor de dados: 31
Autores: Mittenzwei,   Klaus.
This paper is concerned with the timing of an agricultural policy reform under uncertainty. The focus is on the opportunity cost of giving up the option to wait when implementing a policy reform. Including the option value in applied policy analysis can help explain why conventional analyses may find observed policies to be Pareto-inferior. Furthermore, it explains why otherwise profitable policy reforms may be delayed. The theoretical model is applied to Norwegian agricultural policy anticipating a prospective WTO agreement. It is argued that the option value should be incorporated into applied policy analysis when high uncertainty prevails.
Tipo: Conference Paper or Presentation
Palavras-chave: Option value; Policy reform; WTO; Norway; Uncertainty; International Relations/Trade; C61; D78.
Ano: 2002
URL: http://purl.umn.edu/24875

Semi-subsistence farm households and the non-farm rural economy - Perspectives and challenges
Provedor de dados: 31
Autores: Buchenrieder,   Gertrud; Fritzsch,   Jana; Wegener,   Stefan; Curtiss,   Jarmila; Gomez y Paloma,   Sergio.
Semi-subsistence farm households (SFHs) have persevered in Central and Southeastern Europe. An outlook on future perspectives of SFHs asks for reliable information on the phenomenon of SFHs and the impact of policy measures on their development options: (1) intensifying farming, (2) diversifying income creating activities, or (3) exiting farming for waged employment. This article focuses on SFHs and rural non-farm employment (RNFE). On the basis of a comparative 2007-survey of 489 SFHs in Bulgaria, Poland and Romania, three countries with particularly many SFHs, four major types of SFHs (rural pensioners, farmers, rural diversifiers, rural newcomers) were identified. For policy analysis, a multiobjective linear programming household model was developed. In...
Tipo: Conference Paper or Presentation
Palavras-chave: Semi-subsistence; Rural non-farm economy; Policy analysis; Transition countries; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Land Economics/Use; Political Economy; C61; P27; Q12.
Ano: 2009
URL: http://purl.umn.edu/52804

Bioeconomic modeling of wetlands and waterfowl in Western Canada: Accounting for amenity values
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Withey,   Patrick; Wong,   Linda.
This study extends an original bioeconomic model of optimal duck harvest and wetland retention by bringing in amenity values related to the nonmarket (in situ) benefits of waterfowl plsi the ecosystem values of wetlands themselves. The model maximizes benefits to hunters as well as the amenity values of ducks and ecosystem benefits of wetlands, subject to the population dynamics. Results indicate that wetlands and duck harvests need to be increased relative to historical levels. Further, the socially optimal ratio of duck harvest to wetlands is larger than what has been observed historically. Including amenity values leads to a significant increase in the quantity of wetlands and duck harvests relative to models that focus only on hunting values.
Tipo: Conference Paper or Presentation
Palavras-chave: Bioeconomic modelling; Wetland protection; Wildlife management; Nonmarket values; Prairie pothole region; Environmental Economics and Policy; Q57; C61; Q25.
Ano: 2010
URL: http://purl.umn.edu/61308

Pollution Control with Uncertain Stock Dynamics: When, and How, to be Precautious
Provedor de dados: 31
Autores: Athanassoglou,   Stergios; Xepapadeas,   Anastasios.
Replaced with revised version of paper 10/05/11.
Tipo: Working or Discussion Paper
Palavras-chave: Risk; Ambiguity; Robust Control; Precautionary Principle; Pollution Control; Environmental Economics and Policy; C61; D80; D81.
Ano: 2011
URL: http://purl.umn.edu/101296

Analisis de escenarios de políticas para la gestion publica en la agricultura de regadio
Provedor de dados: 31
Autores: Riesgo,   Laura; Gomez-Limon,   Jose Antonio.
En este trabajo se presenta un enfoque metodológico para el análisis de presiones e impactos de la aplicación conjunta de diferentes escenarios de política agraria y de tarifación del agua de riego. Para alcanzar dicho objetivo se asume que los agricultores consideran distintos criterios en la gestión de su actividad productiva. En este contexto decisional se utilizan modelos de programación matemática basados en la Teoría de la Utilidad Multiatributo (MAUT), de modo que pueda simularse el comportamiento de los agricultores en el futuro. Como resultado de dicha simulación no sólo se obtienen las variables de decisión de los agricultores (planes de cultivos), sino también un conjunto de indicadores económicos, sociales y ambientales que serán de utilidad...
Tipo: Journal Article
Palavras-chave: Multiple-Criteria Modelling; Irrigated Agriculture; Scenario Analysis; CAP; Water Policy.; Public Economics; Q25; Q15; C61.
Ano: 2005
URL: http://purl.umn.edu/28768

Properties of Flexible Functional Forms for Modeling Bilateral Export Supply and Import Demand in Multi-Country Agri-Food Models
Provedor de dados: 31
Autores: Winter,   Etti Maria; Frohberg,   Klaus.
This paper illustrates the opportunities of incorporating more advanced functional forms into multi-country trade policy models. It suggests the use of flexible forms such as the Symmetric Generalized McFadden Function (SGMF) or the Normalized Quadratic-Quadratic Expenditure System (NQQES). Particularly if issues namely trade in differentiated products, preferential trade and effects of standards and traceability on bilateral trade are considered the NQQES offers attractive properties since it allows estimating variety specific expenditure elasticities which might compensate for example increased certification costs. A second aim of the paper refers to the critique on the handling of model parameters in calibrated policy models. In general, employed...
Tipo: Conference Paper or Presentation
Palavras-chave: Bilateral trade modelling; Flexible functions; Calibration; International Relations/Trade; Research Methods/ Statistical Methods; B41; C61; F13; Q18; Q17.
Ano: 2005
URL: http://purl.umn.edu/24471

Economic Impacts of Soybean Rust on the US Soybean Sector
Provedor de dados: 31
Autores: Gomez,   Miguel I.; Nunez,   Hector M.; Onal,   Hayri.
The spread of Asian Soybean Rust (ASR) represents a real threat to the U.S. soybean sector. We assess the potential impacts of ASR on domestic soybean production and commodity markets as well as the competitive position of the US in the soybean export market. We develop a mathematical stochastic dynamic sector model with endogenous prices to assess the economic impacts of ASR on US agriculture. The model takes into account the disease spread during the cropping season, the inherent uncertainty regarding the risk of infection, and the dichotomous decisions that farmers make (no treatment, preventive treatment, and curative treatment) facing the risk of infection. Our results suggest substantial impacts from potential ASR spread on agricultural output,...
Tipo: Working or Discussion Paper
Palavras-chave: Asian Soybean Rust; Stochastic Models; Dynamic Models; Agribusiness; Marketing; C61; Q13.
Ano: 2009
URL: http://purl.umn.edu/51177

Efficiency analysis of producers’ organizations (Case of South Eastern and Central planning regions of Bulgaria)
Provedor de dados: 31
Autores: Zaimova,   Darina.
The main aim of this paper is to compare two alternative methods for estimating frontier functions and measuring efficiency in production. The application of Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) to the same data panel provides insights in estimating technical efficiency of producers’ organizations in selected regions in Bulgaria.
Tipo: Journal Article
Palavras-chave: DEA; SFA; Technical efficiency; Frontier production; Farm efficiency; Community/Rural/Urban Development; International Development; C14; C23; C51; C61; C67; D24.
Ano: 2010
URL: http://purl.umn.edu/94636

Single payment scheme and dual values of land in PMP models
Provedor de dados: 31
Autores: Judez,   Lucinio; de Andres,   Rosario; Urzainqui,   Elvira.
Land dual values are one of the important aspects of the results of mathematical programming models used to evaluate the impact of agricultural policy measures at regional and farm level. When the decoupling of direct payments and the payment entitlements per hectare are included in PMP models in the context of the Single Payment Scheme (SPS), the analysis of the land dual values is more complex than in models which do not take these aspects into account. In this paper, we present a theoretical analysis of the land dual values when the SPS is included in PMP farm models. This theoretical analysis is carried out for the base year (linear model) and for a simulated year (quadratic model).The results of this analysis are illustrated by comparing numerically...
Tipo: Conference Paper or Presentation
Palavras-chave: Positive mathematical programming; Single Payment Scheme or Single Farm Payment; Land dual values; Agricultural and Food Policy; C61; Q18.
Ano: 2011
URL: http://purl.umn.edu/98997

On the Optimal Taxation of Common-Pool Resources
Provedor de dados: 31
Autores: Kossioris,   Georgios; Plexousakis,   Michael; Xepapadeas,   Anastasios; Fe Zeeuw,   Aart.
Recent research developments in common-pool resource models emphasize the importance of links with ecological systems and the presence of non-linearities, thresholds and multiple steady states. In a recent paper Kossioris et al. (2008) develop a methodology for deriving feedback Nash equilibria for non-linear differential games and apply this methodology to a common-pool resource model of a lake where pollution corresponds to benefits and at the same time affects the ecosystem services. This paper studies the structure of optimal state- dependent taxes that steer the combined economic-ecological system towards the trajectory of optimal management, and provides an algorithm for calculating such taxes.
Tipo: Working or Discussion Paper
Palavras-chave: Differential Games; Non-linear Feedback Nash Equilibria; Ecosystems; Optimal State-dependent Tax; Environmental Economics and Policy; Q25; C73; C61.
Ano: 2010
URL: http://purl.umn.edu/94619