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	Provedor de dados AgEcon (26) Autor Mullen, Jeffrey D. (26) Bergstrom, John C. (8) Wetzstein, Michael E. (5) Cai, Ruohong (4) Hoogenboom, Gerrit (4) Lin, Shanshan (3) Ngugi, Daniel (3) Centner, Terence J. (2) Risse, Mark L. (2) Sande, Doris N. (2) Adhikari, Murali (1) Al Hassan, Mohammed (1) Beckhusen, Julia (1) Bekchanov, Ulugbek (1) Benson, Bennett I. (1) Bramblett, Jimmy (1) Collier, Sam (1) Devkota, Nirmala (1) Druppel, Jennifer L. (1) Fofana, Makan (1) Mais... Palavra-chave Environmental Economics and Policy (13) Crop Production/Industries (8) Land Economics/Use (7) Farm Management (6) Resource /Energy Economics and Policy (6) Q25 (4) Water quality (4) Agricultural Finance (3) Benefit transfer (3) Economic value (3) Ecosystem (3) Irrigation (3) Land use (3) North Georgia (3) Q53 (3) Risk and Uncertainty (3) Structural time series (3) Acreage response (2) Agribusiness (2) Community/Rural/Urban Development (2) Mais... Tipo do documento Conference Paper or Presentation (19) Journal Article (5) Working or Discussion Paper (2) Ano 2011 (6) 2010 (4) 2009 (6) 2008 (2) 2007 (2) 2006 (2) 2004 (2) 1998 (1) 1997 (1) Mais... País United States (26) Idioma Inglês (26)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 26 Primeira ... 1 2 ... Última A Dynamic Optimal Crop Rotation Model in Acreage Response AgEcon Cai, Ruohong; Bergstrom, John C.; Mullen, Jeffrey D.; Wetzstein, Michael E.. This paper presents a dynamic crop rotation model that shows how crop yield and price volatility could impact crop mix and acreage response under crop rotation considerations. Specifically, a discrete Markov decision model is utilized to optimize producers’ crop rotation decision within a finite horizon. By maximizing net present value of expected current and future profits, a modified Bellman equation helps develop optimum planting decisions. This model is capable of simulating crop rotations with different lengths and structures. Specifically, the corn-soybeans rotations were simulated using the crop rotation model. Tipo: Working or Discussion Paper Palavras-chave: Crop rotation; Acreage response; Bellman equation; Crop Production/Industries; Research Methods/ Statistical Methods. Ano: 2011 URL: http://purl.umn.edu/103949 A Modern Application of Hedonics for Valuing Irrigation AgEcon Beckhusen, Julia; Mullen, Jeffrey D.. Tipo: Conference Paper or Presentation Palavras-chave: Land Economics/Use. Ano: 2006 URL: http://purl.umn.edu/21189 Alternative Housing Development Strategies in Georgia's Coastal Marshlands AgEcon Kriesel, Warren; Mullen, Jeffrey D.. Coastal Georgia continues to experience extremely high population growth rates. People are attracted by coastal amenities, including pleasant views of the saltwater marshes. The real estate market has responded to population growth with a pattern of development that exhibits varying degrees of compatibility with the nearby marshland ecosystem. Among community leaders there is a need for information on development alternatives. Information has been generated from a hedonic price analysis that contains proximity to amenities and development design variables. We conclude that real estate developers have, under certain circumstances, an economic incentive to incorporate more open space in their design of residential subdivisions in marshland environments. Tipo: Conference Paper or Presentation Palavras-chave: Community/Rural/Urban Development. Ano: 2009 URL: http://purl.umn.edu/49514 Amenity benefits and public policy: An application to the Georgia Pecan Industry AgEcon Sande, Doris N.; Mullen, Jeffrey D.; Nzaku, Kilungu. Most agricultural production results in both marketable and non-marketable products. Most policy decisions however, tend to be made based only on the market value, which ignores the non-marketable value or amenity benefits. One type of amenity benefits is farmland amenities which are attributes of farmland that are uniquely provided by actively farmed land. Examples include the scenic beauty of rolling pasture, orchards and the cultural value of farming as a way of life. Farmland also produces non-farm amenities, such as open space, wildlife habitats, and groundwater recharge. Most amenity benefits are classified as public goods in that they are non-excludable and non-rival in terms of use. Thus, most amenities do not have a market value associated with... Tipo: Conference Paper or Presentation Palavras-chave: Amenity Benefits; Pecans; Supply; Public policy; Resource /Energy Economics and Policy. Ano: 2009 URL: http://purl.umn.edu/46851 AN ANALYSIS OF COST EFFECTIVE MANAGEMENT PRACTICES TO MANAGE WATER POLLUTION PROBLEM: A CASE OF TOBESOFKEE CREEK,GEORGIA AgEcon Devkota, Nirmala; Mullen, Jeffrey D.; Bramblett, Jimmy; Adhikari, Murali; Paudel, Laxmi. A cost minimization model was used to find the minimum cost and environmental friendly management practices(MCEFMP). Use of MCEFMP in cattle production seems to be the most cost effective means of reducing water pollution with a marginal cost of $1200 in comparison to use of MCEFMP on other agricultural operations. Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/34714 Assessing the Effects of Climate Change on Farm Production and Profitability: Dynamic Simulation Approach AgEcon Cai, Ruohong; Bergstrom, John C.; Mullen, Jeffrey D.; Wetzstein, Michael E.. In this paper, a dynamic optimization model was developed to simulate how farm-level realized price and profitability respond to yield change which was induced by climate change. Producers' acreage response was included in the dynamic model considering crop rotation effect. In the crop rotation model, a modified Bellman equation was used to dynamically optimize the net present value of farm profit for a five-year interval. This simulation process was repeated through the year 2050. Then yield, price, and acreage response were compiled to generate realized profit. Results generally indicated that reduction in crop yields due to climate change results in reduced farm profitability for most of the states studied. Predicted climate change is more likely to... Tipo: Conference Paper or Presentation Palavras-chave: Dynamic simulation model; Acreage response; Crop rotation; Expected price; Realized price; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis; Risk and Uncertainty. Ano: 2011 URL: http://purl.umn.edu/103420 Assessing the Market for Poultry Litter in Georgia: Are Subsidies Needed to Protect Water Quality? AgEcon Mullen, Jeffrey D.; Bekchanov, Ulugbek; Karali, Berna; Kissel, David; Risse, Mark L.; Rowles, Kristin; Collier, Sam. Concerns about nutrient loads into our waters have focused attention on poultry litter applications. Like many states with a large poultry industry, Georgia recently designed a subsidy program to facilitate the transportation of poultry litter out of vulnerable watersheds. This paper uses a transportation model to examine the necessity of a poultry litter subsidy to achieve water protection goals in Georgia. We also demonstrate the relationship between diesel and synthetic fertilizer prices and the value of poultry litter. Results suggest that a well functioning market would be able to remove excess litter from vulnerable watersheds in the absence of a subsidy. Tipo: Journal Article Palavras-chave: Fertilizer; Phosphorous; Poultry litter; Subsidy; Transportation model; Water quality; Environmental Economics and Policy; Marketing; Q12; Q13; Q25; Q53. Ano: 2011 URL: http://purl.umn.edu/117948 Comparing Ecological Sensitivity with Stream Flow Rates in the Apalachicola-Chattahoochee-Flint River Basin AgEcon Simpson, Tony G.; Druppel, Jennifer L.; Watson, Marissa C.; Benson, Bennett I.; Mullen, Jeffrey D.. Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy; Resource /Energy Economics and Policy. Ano: 2011 URL: http://purl.umn.edu/103259 Dynamic Optimization of Area Revenue Insurance and Consumption Smoothing AgEcon Lin, Shanshan; Mullen, Jeffrey D.; Wetzstein, Michael E.. This study examines the interaction between insurance, credit and liquidity constraints using a stochastic dynamic model. A risk averse farmer whose objective is to manage both production and market risk is assumed to maximize the expected utility of life-time consumption by using both area revenue (AR) insurance and consumption smoothing subject to a credit constraint. The dynamic programming is coded in MATLAB using DDPSOLVE algorithm (Appendix a). DSSAT crop simulation model is used to determine optimal irrigation strategy and to simulate farm level yield. A Bayesian Model is used to estimate expected county-level revenue. The approach and results are illustrated via a numerical example using county level data from Mitchell County in Georgia. Results... Tipo: Conference Paper or Presentation Palavras-chave: Area Revenue Insurance; Consumption Smoothing; Credit Risk; Dynamic Optimization; Bayesian Modeling; Agricultural Finance; Farm Management; Financial Economics. Ano: 2010 URL: http://purl.umn.edu/61419 ECONOMIC ANALYSIS OF ENVIRONMENTAL BENEFITS OF INTEGRATED PEST MANAGEMENT AgEcon Mullen, Jeffrey D.; Norton, George W.; Reaves, Dixie Watts. Public support for integrated pest management (IPM) is derived in part from concerns over food safety and the environment, yet few studies have assessed the economic value of health and environmental benefits of IPM. An approach is suggested for such an assessment and applied to the Virginia peanut IPM program. Effects of IPM on environmental risks posed by pesticides are assessed and society's willingness to pay to reduce those risks is estimated. The annual environmental benefits of the peanut IPM program are estimated at $844,000. The estimates of pesticide risks and willingness to pay can be applied elsewhere in economic assessments of IPM. Tipo: Journal Article Palavras-chave: Integrated pest management; Willingness to pay; Environmental benefits; Crop Production/Industries; Environmental Economics and Policy. Ano: 1997 URL: http://purl.umn.edu/15057 Effect of Water Price on the Multicrop Production Decision: Appling Fixed Allocatable Input Model in Georgia AgEcon Yu, Yingzhuo; Mullen, Jeffrey D.; Hoogenboom, Gerrit. This study applies the fixed allocatable input model to test the effect of water price on the multiple production decision in Georgia, U.S. The limited dependent variable models are applied and intensive data are analyzed in this study to estimate the decision for crop choice, land allocation, product supply, and water demand functions at crop-level. In order to investigate the effect of water price on crop-level demand, the total water price effect on farm water demand is decomposed the intensive margin and extensive margin. Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 2006 URL: http://purl.umn.edu/35479 Environmental Benefits from Reduced Pesticide Use and Returns to Research: An Application to the U.S. Cotton Industry AgEcon Sande, Doris N.; Mullen, Jeffrey D.; Matekole, Augustus N.. Cotton production is one of the main pesticide use industries in the U.S. This intensive use has resulted in the disruption of naturally occurring biological control factors that regulate other insect pest populations and “the pesticide treadmill”. The result is resistance to insecticides, high control costs and unacceptable levels of chemical insecticides in the environment. Concerns about the environmental and human health effects from pesticide use thus need to be modeled in evaluation studies. Tipo: Conference Paper or Presentation Palavras-chave: Cotton; Pesticide use; Environmental effects; Supply function; Crop Production/Industries; Environmental Economics and Policy. Ano: 2010 URL: http://purl.umn.edu/56549 Environmental Mechanism Designs in a New Order of Regulatory Capitalism AgEcon Mullen, Jeffrey D.; Centner, Terence J.; Wetzstein, Michael E.. Complexity of environmental programs is most apparent with information asymmetries, making the design of efficient mechanisms particularly challenging. As developed theoretically in this paper, a new regulatory capitalism paradigm mating voluntary agreements with environmental education can produce outcomes at least as efficient as voluntary agreements alone. Such a design exploits a key difference between voluntary agreements versus educational programs in terms of their impact on agents' incentive compatibilities. Specifically, in a principal-agent model, voluntary agreements are associated with an incentive-compatibility constraint, whereas educational programs are not. The efficient bundle will likely consist of a set of education programs and... Tipo: Conference Paper or Presentation Palavras-chave: Command and control; Environmental education; Environmental policy; Voluntary agreements; Environmental Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/9357 Examining the Effects of Ecological and Political Boundaries on the Potential for Water Quality Trading: Lessons from a Southeastern Trading Framework AgEcon Keiser, David A.; Mullen, Jeffrey D.; Bergstrom, John C.; Smith, Nathan B.; Radcliffe, David E.; Risse, Mark L.; Fowler, Laurie A.. Water quality trading (trading) as a means to improve water quality has become an increasingly popular instrument considered by environmental policy makers. Although the U.S. Environmental Protection Agency lists more than forty current trading programs in the U.S., only a few active markets exist. The literature identifies several hurdles to trading, overcoming which requires a deeper understanding of the interaction between local environmental, legal, and economic conditions. Particular challenges include thin markets, uncertainty related to the course and fate of nutrient flows, varying degrees of political support, and high transaction costs related to market infrastructure, monitoring, and enforcement. These hindrances often arise from and... Tipo: Conference Paper or Presentation Palavras-chave: Water quality trading; Phosphorus trading; Nutrient trading; Water pollution; Pollution markets; Environmental Economics and Policy; Land Economics/Use; Public Economics. Ano: 2009 URL: http://purl.umn.edu/49323 Farm-Level Risk Management Using Irrigation and Weather Derivatives AgEcon Lin, Shanshan; Mullen, Jeffrey D.; Hoogenboom, Gerrit. An agronomic crop growth model—the Decision Support System for Agro-Technology Transfer—and a constant relative risk aversion utility function are used to examine corn irrigation strategies in Mitchell County, Georgia. Precipitation contracts are designed to help farmers manage risk. Three conclusions originate from the findings. First, the optimal irrigation strategy can greatly increase producers’ certainty-equivalent revenue. Second, changes in water pricing policy would have a limited impact on the amount of water used. And third, across levels of risk preference, the precipitation contracts are not effective in increasing certainty-equivalent revenue or reducing cumulative water use. Tipo: Journal Article Palavras-chave: Irrigation risk management; Water pricing policy; Weather derivative contract; Agribusiness; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; D8; G22; Q15; Q25. Ano: 2008 URL: http://purl.umn.edu/46986 Irrigated Acreage Projections in Georgia AgEcon Cai, Ruohong; Mullen, Jeffrey D.; Bergstrom, John C.. Irrigated acreage is an important indicator for agricultural water demand which is a major category of water use. Three methodologies were applied in this study to project irrigated acreage of major crops in Georgia from 2010 to 2050. These three methodologies show consistent results. Total irrigated acreage of major crops in Georgia is projected to increase for the next 40 years. The acreage projection results provide useful information for Georgia agricultural policy makers and farmers. However, the methodologies used in the study have some limitations. They can only be used under certain assumptions. Thus, better methodologies are needed for future related research. Tipo: Conference Paper or Presentation Palavras-chave: Irrigated acreage projection; Acreage response elasticities; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy. Ano: 2010 URL: http://purl.umn.edu/56468 Land Use Change and Ecosystem Valuation in North Georgia AgEcon Ngugi, Daniel; Mullen, Jeffrey D.; Bergstrom, John C.. This study seeks to forecast land use change in a North Georgia ecosystem, and estimate the economic value of the ecosystem using benefit transfer techniques. We forecast land use change based on a structural time series model and a simple growth rate model. The study suggests a lower bound willingness to pay value of about USD 16,000 per year to ensure compliance with fishing and drinking water quality standards with regard to fecal coliform bacteria and dissolved oxygen. Conservation efforts are likely to cost less than the cost of defensive behavior or ecosystem restoration. Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem; Economic value; North Georgia; Land use; Water quality; Structural time series; Benefit transfer; Forecasting.; Environmental Economics and Policy; Land Economics/Use; Q51; Q53; Q57. Ano: 2009 URL: http://purl.umn.edu/46853 Land Use Change and Ecosystem Valuation in North Georgia AgEcon Ngugi, Daniel; Mullen, Jeffrey D.; Bergstrom, John C.. A model of land allocation at the aggregate watershed level was developed assuming profit/net benefit maximization under risk neutrality. The econometric land use model was analyzed as an equation by equation SURE model as all the independent variables were the same for both equations. In analyzing effect of land use change on water quality, we took year 2005 as our baseline and postulated three land use scenarios. We applied Benefit Transfer techniques to value water quality changes resulting from land use change and estimated lower bounds for WTP to improve water quality to meet the FCB criterion for drinking water supply and fishing waters and BOD (DO) criteria for fishing waters. Water quality modeling revealed that land use change would result in... Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem; Economic value; North Georgia; Land use; Land use change; Fish; Water quality; Structural time series; Willingness to pay; Benefit transfer; Forecasting; Vector autoregression; Upper Chattahoochee River; Environmental Economics and Policy; Land Economics/Use. Ano: 2008 URL: http://purl.umn.edu/6119 Land Use Change, Benefit Transfer and Ecosystem Valuation in North Georgia AgEcon Ngugi, Daniel; Mullen, Jeffrey D.; Bergstrom, John C.. This study seeks to forecast land use change in a North Georgia ecosystem, and estimate the economic value of the ecosystem using benefit transfer techniques. We forecast land use change based on a structural time series model and a simple growth rate model. The study suggests a lower bound willingness to pay value of about USD 16,000 per year to ensure compliance with fishing and drinking water quality standards with regard to fecal coliform bacteria and dissolved oxygen. Conservation efforts are likely to cost less than the cost of defensive behavior or ecosystem restoration. Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem; Economic value; North Georgia; Land use; Water quality; Structural time series; Benefit transfer; Forecasting; Environmental Economics and Policy; Land Economics/Use; Q51; Q53; Q57; R14. Ano: 2009 URL: http://purl.umn.edu/47110 LONG-RUN STRIGA CONTROL BY SUBSISTENCE FARMERS IN MALI AgEcon Mullen, Jeffrey D.; Kebe, Demba; Taylor, Daniel B.; Fofana, Makan. A dynamic programming model is developed to identify barriers to the adoption of long-run control programs for the parasitic weed Striga. The model is applied to Sirakorola in northwestern Mali. The ability of national and village-level institutions to overcome the barriers to adoption is explored. Tipo: Conference Paper or Presentation Palavras-chave: Community/Rural/Urban Development; Research and Development/Tech Change/Emerging Technologies. Ano: 1998 URL: http://purl.umn.edu/20818 Registros recuperados: 26 Primeira ... 1 2 ... Última

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