SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Sohngen, Brent; Sedjo, Roger A..

In this paper, we compare and contrast two types of timber models that have been used for public policy analysis. These models have been variously used to predict price, inventory and market welfare impacts under different exogenous forces that impact timber markets. The framework and theory for each model type is presented and discussed. We then thoroughly test the two model types across six potential exogenous shocks to timber markets, ranging from instantaneous demand shocks to gradual supply adjustments. Our comparison indicates that these models predict potentially important differences in timber market behavior. These differences are important to consider for those who do public policy analysis.

An Agro-Economic Production Model for a Middle European River Basin - First Results of CAP Reform Scenario Calculations

Palavras-chave: Timber markets; Models; Dynamic adjustment; Optimization; Resource /Energy Economics and Policy; C62; Q21; Q23.

Ano: 1996

URL: http://purl.umn.edu/10467

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.

An Analysis of Global Timber Markets

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

Sohngen, Brent; Mendelsohn, Robert; Sedjo, Roger A.; Lyon, Kenneth S..

This paper presents a model of global timber markets that captures the evolution of a broad array of forest resources and timber market margins over time. These margins include the inaccessible northern and tropical margins, plantation establishment, and timberland management. A baseline case is presented and discussed. Five alternative scenarios are then presented. These scenarios allow us to consider several important questions about timber market behavior and the future supply of industrial fiber: (1) What happens along the northern and the tropical inaccessible margins? (2) What role do timber plantations play? and (3) How do shifts in management intensity interact with market forces? The baseline case suggests that both prices and harvests rise over...

Biotechnology and Planted Forests: Assessment of Potential and Possibilities

Palavras-chave: Global timber markets; Forest plantations; Model; Forecast; Resource /Energy Economics and Policy; Q10; Q21; Q23; Q24.

Ano: 1997

URL: http://purl.umn.edu/10449

Sedjo, Roger A..

This paper addresses the potential impact of the introduction and development of biotechnology on planted forests. It includes a description of some recent innovations in forestry including the use of traditional breeding, and also more recent innovations involving biotechnology, including the development of clonal propagation and the use of modern molecular biology techniques. In addition to describing these innovations, the paper undertakes an assessment of their probable impact on future production of the forest industry, on the global timber supply, and on future markets for timber and wood products. The paper offers a description of recent innovations in tree breeding and biotechnology, including a discussion of innovations in agriculture that have...

Biotechnology's Potential Contribution to Global Wood Supply and Forest Conservation

Palavras-chave: Biotechnology; Plantation forests; Genetic modification; Genetic research; Economic benefits; Transgenic; GMO; Resource /Energy Economics and Policy; Q21; Q23; Q16; O32; L73.

Ano: 1999

URL: http://purl.umn.edu/10862

Sedjo, Roger A..

Over the past 30 years, industrial plantation forests have become a major supplier of industrial wood. There are several reasons for this, including the improved economics of planted forests due to biotechnological innovations, the increases in natural forest wood costs due to increasing inaccessibility, and rising wood costs from natural forests due to new environmental restrictions related to logging. Forestry today is on the threshold of the widespread introduction of biotechnology into its operational practices. In many cases, the biotechnology likely to be introduced is simply an extension of that being utilized in agriculture, such as herbicide-tolerant genes. However, biotechnology in forestry also is developing applications unique to forestry,...

Can Carbon Sinks Be Operational? RFF Workshop Proceedings

Palavras-chave: Biotechnology; Breeding; Forestry; Tree plantations; Timber; Fiber; Genes; GMOs; Industrial wood; Economics; Benefits; Costs; Resource /Energy Economics and Policy; Q21; Q23; Q16; O32; L73.

Ano: 2001

URL: http://purl.umn.edu/10708

Sedjo, Roger A.; Toman, Michael.

An RFF Workshop brought together experts from around the world to assess the feasibility of using biological sinks to sequester carbon as part of a global atmospheric mitigation effort. The chapters of this proceeding are a result of that effort. Although the intent of the workshop was not to generate a consensus, a number of studies suggest that sinks could be a relatively inexpensive and effective carbon management tool. The chapters cover a variety of aspects and topics related to the monitoring and measurement of carbon in biological systems. They tend to support the view the carbon sequestration using biological systems is technically feasible with relatively good precision and at relatively low cost. Thus carbon sinks can be operational.

Conservation Programs: Will Grain Production Reclaim Acres in the South?

Palavras-chave: Carbon; Sinks; Global warming; Sequestration; Forests; Environmental Economics and Policy; Q10; Q15; Q21; Q23; Q24.

Ano: 2001

URL: http://purl.umn.edu/10480

Petrolia, Daniel R.; Ibendahl, Gregory A..

A state-level analysis of the Re-enrollment and Extension (REX) program on southern states indicates a positive relationship between percentage of tree acreage and Conservation Reserve Program (CRP) re-enrollment for states in which conservation acreage is dominated by trees. However, the relationship depends on crop mix where CRP acreage is dominated by grass. County-level analysis suggests that states will differ in how quickly they opt out of CRP. Of the states examined, Arkansas is the most likely to move land to corn, with Mississippi the least likely. Arkansas and Kentucky will switch to soybean first, followed by Mississippi and Georgia.

Tipo: Journal Article

Palavras-chave: Conservation Reserve Program (CRP); Corn; Land use change; Re-enrollment and Extension Program (REX); Soybean; Agribusiness; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Q15; Q18; Q21; Q24.

Ano: 2008

URL: http://purl.umn.edu/47197

Consumers' Short- and Long-Term Response to "Mad Cow": Beef Consumption and Willingness-to-Pay for Organic Beef in Italy

Corsi, Alessandro.

This paper aims at assessing: 1) consumers' habits concerning beef consumption and their responses to the BSE both immediately and at a longer term; 2) consumers' attitudes and willingness to pay for organic beef, an obvious alternative to regular beef in terms of safety. It is based on two random telephone surveys, the first one conducted in 2001 (few months after the BSE crisis) and the second one in 2003. The analysis shows that though the effect of the BSE crisis has weakened along with time distance, it left some permanent signs in consumers' behaviour. The analysis of the effect of the time distance from the BSE crisis on consumers' attitudes towards organic beef leads to the main conclusion that the demand for organic beef reduced, but that in the...

Determinants of Demand for Participation in Wildlife Hunting: A County level Analysis

Palavras-chave: BSE; Organic beef; Willingness to pay; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Q13; Q21.

Ano: 2005

URL: http://purl.umn.edu/24569

Poudyal, Neelam C.; Cho, Seong-Hoon; Bowker, James Michael.

We developed an economic demand model of wildlife hunting and found that sociodemograpahic and ecological characteristics of county are its strong predictors. Result shows that the hunting is not popular among younger generation; and promoting hunting clubs and lease-hunting, recruiting young hunters could be effective policy considerations for retaining/promoting hunting.

Determinants of Organic Farming Conversion

Palavras-chave: Wildlife hunting; License sales; Demand model; Resource /Energy Economics and Policy; Q21; Q26; L83.

Ano: 2007

URL: http://purl.umn.edu/34860

De Cock, Lieve.

In this paper the behavioural change framework of Ajzen and Fishbein is used to explore whether attitudes towards organic farming, the perceived social pressure of the environment and the perceived feasibility of organic farming standards on the farm determine the willingness of farmers to convert to organic farming methods. These variables together with the business and personal objectives and the organic farming information seeking behaviour of the farmer were used in an ordinal regression procedure to predict the intended organic farming conversion behaviour of conventional farmers.

Development, Testing and Application of ACRE: An Agro-Economic Production Model on Regional Level

Palavras-chave: Organic farming; Firm behaviour; Farm Management; Q01; Q21.

Ano: 2005

URL: http://purl.umn.edu/24675

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.

Differential Influence of Relative Poverty on Preferences for Ecosystem Services: Evidence from Rural Indonesia

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

Glenk, Klaus; Barkmann, Jan; Schwarze, Stefan; Zeller, Manfred; Marggraf, Rainer.

Ecosystem services generate benefits that enter human consumption either directly or indirectly via their contribution to human production activities. In this contribution, we provide evidence that (i) the demand of peasants for ecosystem services in rural Indonesia depends on relative poverty; and that (ii) the type of reaction to poverty depends on the specific relation of the ecosystem services to peasant production and consumption. In early 2005 a representative choice experiment study was conducted in the Lore Lindu area in Central Sulawesi, Indonesia, to quantify regional economic preferences (marginal willingessto- pay: MWTP) for four different ecosystem services (n=249; rattan and water availability, shading in cacao agroforestry, population size...

Do Consumers React to the Shape of Supply? Water Demand under Heterogeneous Price Structures

Palavras-chave: Relative poverty; Choice experiment; Ecosystem services; Environmental valuation; Resource /Energy Economics and Policy; Q21; Q51; Q56; Q57.

Ano: 2006

URL: http://purl.umn.edu/25681

Olmstead, Sheila M.; Hanemann, W. Michael; Stavins, Robert N..

Urban water pricing provides an opportunity to examine whether consumers react to the shape of supply functions. We carry out an empirical analysis of the influence of price and price structure on residential water demand, using the most price-diverse, detailed, household-level water demand data yet available for this purpose. We adapt the Hausman model of labor supply under progressive income taxation to estimate water demand under non-linear prices. Ours is the first analysis to address both the simultaneous determination of marginal price and water demand under block pricing and the possibility of endogenous price structures in the cross section. In order to examine the possibility that consumers facing block prices are more price-responsive, all else...

Does Marginal Price Matter? A Regression Discontinuity Approach to Estimating Water Demand

Palavras-chave: Non-linear pricing; Water demand; Price elasticity; Resource /Energy Economics and Policy; D12; Q21; Q25; Q28; L95.

Ano: 2005

URL: http://purl.umn.edu/10672

Nataraj, Shanthi; Hanemann, W. Michael.

Although complex pricing schedules are increasingly common in utility billing, it is difficult to determine whether consumers respond to complicated marginal prices because price changes are often confounded with simultaneous demand shocks or non-price policies. To overcome this challenge, we exploit a natural experiment - the introduction of a third price block in an increasing block pricing schedule for water - in Santa Cruz, California. Using a regression discontinuity design, we find that consumers do respond to changes in marginal price. Doubling marginal price led to a 12% decrease in water use (500 cubic feet per bill) among high-use households.

Dynamics of Phosphorus Fertilization and Liming Under Land Tenure Insecurity

Palavras-chave: Water demand; Regression models; Price policy; Consumer behavior; Demand and Price Analysis; Research Methods/ Statistical Methods; D12; Q21; Q25; L95.

Ano: 2008

URL: http://purl.umn.edu/47078

Myyra, Sami; Pietola, Kyosti.

This article solves and characterizes optimal decision rules to invest in irreversible land improvements conditional on land tenure insecurity. Economic model is a normative dynamic programming model with known parameter for the one period returns and transition equations. The decision rules are solved numerically conditional on alternative scenarios on the likelihood that the lease contract and, thus, farmer access to land is either renewed or expires. The model parameters represent Finnish soil quality and production conditions. The results suggest that irreversible land improvements decrease quickly and the yields decline gradually when the farmer is confronted with land tenure insecurity caused by uncertain renewal of the lease contract.

Economic Development Impacts of Wind Turbine Development in U.S. Counties

Palavras-chave: Agriculture; Dynamic programming; Land Economics/Use; Q15; Q21.

Ano: 2005

URL: http://purl.umn.edu/24633

Brown, Jason P.; Hoen, Ben; Lantz, Eric; Pender, John L.; Wiser, Ryan.

Replaced with revised version of poster 07/07/11.

El Nino, Ice Storms, and the Market for Residential Fuelwood in Eastern Canada and the Northeastern U.S.

Palavras-chave: Wind turbine; Propensity score matching; Spatial lag model; Community/Rural/Urban Development; Resource /Energy Economics and Policy; O13; Q21; R11.

Ano: 2011

URL: http://purl.umn.edu/103437

Jagger, Pamela; White, William; Sedjo, Roger A..

Extreme weather events such as the ice storm that affected eastern Canada and the Northeastern US in January of 1998 have significant impacts on both human populations and forests. One of the questions currently facing climate scientists is whether or not better forecasting of such events would lessen the economic impacts borne by households, industry, agricultural producers and the public sector when such weather events occur. This case study examines the economic impacts of the ice storm on the residential market for fuelwood. It is hypothesized that demand for fuelwood will increase due to the failure of non-wood heating sources during the ice storm. In addition, damage to trees in the region should increase the supply of fuelwood; the net effect of...

El valor del uso recreativo del Parque Natural Sierra de María-Los Velez (Almería)

Palavras-chave: Fuelwood; El Nino; Ice storm; Forest management; Extreme weather event; Climate forecasting; Forest policy; Resource /Energy Economics and Policy; D1; D13; Q2; Q21; Q23; Q42.

Ano: 1999

URL: http://purl.umn.edu/10535

Castillo, Ma Encarnacion; Sayadi, Samir; Cena, Felisa.

RESUMEN: El objetivo de este artículo es estimar el valor de uso recreativo de un espacio protegido en el sur de España, el Parque Natural Sierra de María-Los Vélez en Almería, mediante el método del coste de viaje zonal. Los resultados obtenidos muestran un excedente del consumidor, entre 7,67-13,29 €/persona, según el escenario propuesto teniendo en cuenta el tiempo de desplazamiento como un coste o como un disfrute. Finalmente, se presentan algunas conclusiones y, a partir de ellas, se perfilan estrategias con el fin de potenciar el uso recreativo del Parque y mejorar su gestión futura.

Tipo: Journal Article

Palavras-chave: Método del coste de viaje; Parque Natural de Almería; Uso recreativo; Valoración de recursos naturales; Agricultural and Food Policy; Q21; Q26.

Ano: 2008

URL: http://purl.umn.edu/57233

Environmental and Technology Policies for Climate Change and Renewable Energy

Fischer, Carolyn; Newell, Richard G..

We assess different policies for reducing carbon dioxide (CO2) emissions and promoting the innovation and diffusion of CO2-reducing power technologies: (1) emissions price, (2) tax on fossil power, (3) tradable emissions performance standard, (4) market share requirement for renewables, (5) renewables production subsidy, and (6) R&D subsidy for renewables. We evaluate the relative performance of the policies according to incentives they provide along different avenues for emissions reduction, their efficiency, and other salient outcomes. We also assess how the nature of technological progress-whether it occurs by learning by doing or R&D investment and the degree of knowledge spillovers -affects the desirability of different policies. In a...

Environmental Indices for the Chinese Grain Sector

Palavras-chave: Environment; Technology; Policy instruments; Climate change; Renewable energy; Environmental Economics and Policy; Q21; Q28; Q48; O38.

Ano: 2005

URL: http://purl.umn.edu/10789

Chen, Ming; Karp, Larry S..

Increased population pressure and political decisions have led to more intensive agricultural practices in China. As in other regions of the world, these practices can damage natural capital We use the Kalman filter and Chinese panel data to estimate an index of environmental productivity (natural capital), together with the parameters of environmental dynamics and the production function. These estimates show that intensive practices are likely to have had persistent, substantial, and statistically significant negative effects on productivity. Ignoring these effects can cause substantial misallocation of resources. The results illustrate the possibility of estimating sectoral environmental indices using data commonly available.