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Registros recuperados: 15
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ACHIEVING EFFICIENCY AND EQUITY IN IRRIGATION MANAGEMENT: AN OPTIMIZATION MODEL OF THE EL ANGEL WATERSHED, CARCHI, ECUADOR AgEcon
Evans, Elizabeth M.; Lee, David R.; Boisvert, Richard N..
The objective of this paper is to address the problems of inefficiency and inequity in water allocation in the El Angel watershed, located in Ecuador's Sierra region. Water is captured in a high-altitude region of the watershed and distributed downstream to producers in four elevation-defined zones via a system of canals. Upstream and downstream producers face radically different conditions with respect to climate and terrain. A mathematical programming model was created to study the consequences of addressing chronic water scarcity problems in the watershed by shifting water resources between the four zones. The model captures the nature of water use by humans, crops and dual purpose cattle. Its objective function maximizes producer welfare as...
Tipo: Conference Paper or Presentation Palavras-chave: Mathematical programming; Water allocation; Efficiency; Equity; Resource /Energy Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/19742
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Climate change: Impact on agriculture and costs of adaptation AgEcon
Nelson, Gerald C.; Rosegrant, Mark W.; Koo, Jawoo; Robertson, Richard D.; Sulser, Timothy B.; Zhu, Tingju; Ringler, Claudia; Msangi, Siwa; Palazzo, Amanada; Batka, Miroslav; Magalhaes, Marilia Castelo; Valmonte-Santos, Rowena A.; Ewing, Mandy; Lee, David R..
Tipo: Report Palavras-chave: Environmental Economics and Policy; Farm Management.
Ano: 2009 URL: http://purl.umn.edu/57371
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COMBINING INTERNAL AND EXTERNAL INPUTS FOR SUSTAINABLE INTENSIFICATION AgEcon
Ruerd, Ruben; Lee, David R..
Tipo: Report Palavras-chave: Environmental Economics and Policy; Production Economics.
Ano: 2000 URL: http://purl.umn.edu/16374
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Effects of participation in organic markets and farmer-based organizations on adoption of soil conservation practices among small-scale farmers in Honduras AgEcon
Wollni, Meike; Lee, David R.; Thies, Janice E..
Conservation agriculture is often perceived to provide “win-win” outcomes for farmers leading to reduced erosion and off-site sedimentation, as well as improved soil fertility and productivity. However, adoption rates for conservation agriculture in many regions of the world remain below expected levels. This paper looks at the effect of organic markets in providing incentives for farmers to adopt soil conservation practices based on the willingness of consumers to pay a price premium for the use of sustainable production technologies. Farmer-based organizations may help farmers overcome information deficiencies with respect to production processes as well as consumer preferences. Based on original survey data from 241 small-scale farm households in...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Land Economics/Use.
Ano: 2008 URL: http://purl.umn.edu/6423
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Effects of Participation in Organic Markets and Farmer-based Organizations on the Adoption of Soil Conservation Practices among Small-scale Farmers in Honduras AgEcon
Wollni, Meike; Lee, David R.; Thies, Janice E..
Conservation agriculture is often perceived to provide “win-win” outcomes for farmers leading to reduced erosion and off-site sedimentation, as well as improved soil fertility and productivity. However, adoption rates for conservation agriculture in many regions of the world remain below expected levels. This paper looks at the effect of organic markets in providing incentives for farmers to adopt soil conservation practices. Farmer-based organizations may link farmers to these markets by helping them overcome information deficiencies with respect to production standards and consumer preferences. Based on original survey data from 241 small-scale farm households in Honduras, we find that both participation in organic markets and farmer-based groups have...
Tipo: Conference Paper or Presentation Palavras-chave: Soil conservation; Technology adoption; Organic markets; Farmer organizations; Agricultural and Food Policy; Community/Rural/Urban Development; Environmental Economics and Policy; International Development; Q01; Q12; Q13; Q16.
Ano: 2009 URL: http://purl.umn.edu/51669
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EXPLAINING THE ADOPTION AND DISADOPTION OF SUSTAINABLE AGRICULTURE: THE CASE OF COVER CROPS IN NORTHERN HONDURAS AgEcon
Neill, Sean P.; Lee, David R..
Although technology adoption has been the subject of a great deal of economic research, that focused on the economics of adoption of low-input "sustainable" systems has been much more limited and recent. This paper attempts to explain the recent decline in the use of cover crops using in maize farming in the Department of Atlantida, Honduras. In the early 1970's, farmers in the region began rotating maize with the velvetbean (mucuna ssp.), a system learned from Guatemalan immigrants. Tohe mucuna-maize system decreased the labor required for maize farming even as it increased yields, prevented erosion, and conferred a variety of other agronomic benefits. By 1992, estimates show that the system had diffused among more than 60% of farmers in the Department....
Tipo: Working or Discussion Paper Palavras-chave: International development; Sustainable agriculture; Adoption; Disadoption; Farmer management; Crop Production/Industries.
Ano: 1999 URL: http://purl.umn.edu/14756
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FACTORS AFFECTING PARTICIPATION IN THE MILK DIVERSION PROGRAM IN THE U.S. AND NEW YORK AgEcon
Lee, David R.; Boisvert, Richard N..
Participation in the 1984-85 Milk Diversion Program (MDP) is examined through the analysis of aggregate state level data for the U.S. and county level data from New York. Linear probability, logit and probit models of participation are estimated. The empirical results are highly similar across models and identify the important determinants of farmer participation in the MDP. Models explaining contracted diversion levels are also estimated but do not have the explanatory power of the participation models. The implications of the results for the analysis of U.S. dairy policy alternatives are discussed.
Tipo: Journal Article Palavras-chave: Agricultural and Food Policy; Livestock Production/Industries.
Ano: 1985 URL: http://purl.umn.edu/28948
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FEED GRAINS AND MEAT PRODUcnON IN VENEZUElA. AgEcon
Marrero, Fernando; Kyle, Steven C.; Lee, David R..
This paper presents a description and analysis of the Venezuela feed grain and meat sectors from 1958 to the present time. Government policies toward these sectors are described and elasticities of supply and demand are estimated in order to provide a basis for predicting the effects of policy changes.
Tipo: Technical Report Palavras-chave: Crop Production/Industries; Livestock Production/Industries.
Ano: 1993 URL: http://purl.umn.edu/123008
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Labor Market Dynamics in the U.S. Food Sector AgEcon
Lee, David R..
Tipo: Working or Discussion Paper Palavras-chave: Agribusiness; Labor and Human Capital.
Ano: 1987 URL: http://purl.umn.edu/115799
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Payments for Watershed Services: An Application to Irrigation Pricing in the El Angel Watershed, Carchi, Ecuador AgEcon
Vega, J.; Lee, David R.; Boisvert, Richard N.; Steenhuis, Tammo S.; Proano, M.; Poats, S..
Water scarcity is increasingly viewed as the principal constraint limiting agricultural production and human livelihood improvement in the rural areas of many developing countries. Policies that encourage more efficient and equitable water use - including the introduction of incentive-based water pricing systems - are an important challenge. This paper reports the results of a mathematical programming model which was constructed for the El Angel watershed in northern Ecuador with the goal of exploring the effects of several water pricing alternatives. The model incorporates farmers' crop and pasture planting and resource allocation decisions, based on maximizing regional gross margin subject to land, water, labor, seasonal, food security and other...
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/25655
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Spatial Price Integration in U.S. and Mexican Rice Markets AgEcon
Weber, K.; Lee, David R..
Agricultural trade between the U.S. and Mexico has become progressively liberalized over the past 20 years, with significant increases in bilateral trade in many sectors. The rice sector in both nations, however, continues to be highly protected, with producers and millers on both sides of the border continuing to protest the other nation's protectionist policies. This paper examines market efficiency and spatial price integration in ten U.S. and Mexican rice markets over the 1998-2002 period, during which a retaliatory antidumping duty was imposed by Mexico. The paper uses a multiple step analytical process, including analysis of market price differentials, stationarity tests, bivariate and multivariate cointegration tests, and impulse response analysis....
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Demand and Price Analysis.
Ano: 2006 URL: http://purl.umn.edu/25542
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STRUCTURAL ADJUSTMENT AND AGRICULTURAL EXPORT RESPONSE IN LATIN AMERICA AgEcon
Markussen, Kristin A.; Lee, David R..
Expanding exports has been one of the principal goals of structural adjustment programs aimed at restoring external balance of payments equilibria in many developing countries. This paper analyzes the changing responsiveness of agricultural exports to price and exchange rate variation for selected crops in eight Latin American countries over the period 1961-1990. The results show that: (1) commodity and country disaggregation in estimation generates much higher export response elasticities than previously estimated; (2) real exchange rate changes dominate price changes in stimulating export response; and (3) statistical tests confirm structural change in export response elasticities in over half of the equations estimated. Overall, the evidence suggests...
Tipo: Working or Discussion Paper Palavras-chave: International Relations/Trade.
Ano: 1994 URL: http://purl.umn.edu/7268
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THE ANDEAN PRICE BAND SYSTEM: EFFECTS ON PRICES, PROTECTION AND PRODUCER WELFARE AgEcon
Villoria, Nelson; Lee, David R..
The Andean Community's Price Band System (APBS), introduced in 1995, had the announced goal of reducing domestic price instability by buffering fluctuations in international prices through use of a variable import tariff. This paper evaluates the effects of the Andean Price Band System on domestic producer price variability, levels of nominal protection and changes in producer welfare. Application is made to four important food products - maize, rice, sugar and milk - in Colombia, Ecuador and Venezuela, from the period 1990 to 1998. The effects of the APBS on producer price variability are analyzed through 1) comparing coefficients of variation of detrended, monthly deseasonalized real prices before and after the harmonization of the APBS in 1995, and 2)...
Tipo: Conference Paper or Presentation Palavras-chave: Andean Community; Price band system; Agricultural prices; Price stabilization; Demand and Price Analysis.
Ano: 2002 URL: http://purl.umn.edu/19751
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THE DETERMINANTS OF ADOPTION OF SUSTAINABLE AGRICULTURE TECHNOLOGIES: EVIDENCE FROM THE HILLSIDES OF HONDURAS AgEcon
Arellanes, Peter; Lee, David R..
Recent years have seen a growth of interest in the adoption and diffusion of low-input sustainable agricultural technologies among smallholder agriculturalists in developing countries. This paper examines the adoption of one such technology, labranza minima, a form of minimum tillage, among resource-poor agricultural households in villages in central Honduras. Logistic regression is used to analyze the determinants of adoption of minimum tillage among a sample of 250 agricultural households. The results show that plots with irrigation, plots farmed by their owners and plots with steeper slopes were more likely canididates for minimum tillage adoption. Farmer household characteristics are not generally found to represent significant influences on...
Tipo: Conference Paper or Presentation Palavras-chave: Technology adoption; Sustainable agriculture; Minimum tillage; Farm Management.
Ano: 2003 URL: http://purl.umn.edu/25826
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TRANSPORTATION DEREGULATION AND INTERREGIONAL COMPETITION IN THE NORTHEASTERN FEED ECONOMY AgEcon
Randolph, Thomas F.; Lee, David R..
The effects of rail deregulation on feed transportation in the Northeast are examined through construction of a spatial equilibrium model of the Northeastern feed industry. Short-run and long-run effects of deregulation are analyzed through incorporation of rail rate structures for 1981 and 1984, respectively, into model simulations and comparison with pre-deregulation base year results (1980). The results show that the Northeast feed economy has generally benefited from rail deregulation which has led to lower transportation costs, lower feed costs and an enhanced competitive position relative to the Southeastern U.S.
Tipo: Journal Article Palavras-chave: Public Economics.
Ano: 1986 URL: http://purl.umn.edu/29051
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