Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 44
Primeira ... 123 ... Última
Imagem não selecionada

Imprime registro no formato completo
ASSESSING ORGANIC PRODUCTION EFFICIENCY: A STOCHASTIC DISTANCE FUNCTION APPROACH AgEcon
Lohr, Luanne; Park, Timothy A..
A stochastic distance function frontier was estimated using data from a national survey of organic farmers to evaluate the effect of farm-specific attributes on efficiency. Farm-specific and regional variables that shift efficiency were incorporated into the multioutput distance function, including organic farming experience, use of soil-improving inputs, and farmer involvement in research. Participation in research projects reduces the level of on-farm technical inefficiency with mean technical efficiency of participating farmers 25 percent higher than nonparticipating farmers. The results suggest that differences in productivity across organic farmers are closely linked to input use and observable management decisions.
Tipo: Conference Paper or Presentation Palavras-chave: Productivity Analysis.
Ano: 2004 URL: http://purl.umn.edu/36244
Imagem não selecionada

Imprime registro no formato completo
Assessing the Technical and Allocative Efficiency of Marketing Decisions by U.S. Organic Producers AgEcon
Lohr, Luanne; Park, Timothy A..
We develop measures of technical and allocative efficiency of producers in marketing certified organic products. A stochastic output distance frontier and the associated revenue share equations are estimated using comprehensive U.S. data on certified organic producers. Farm-level measures of technical efficiency are calculated and factors which enhance performance are identified. Factors that systematically influence allocative efficiency are assessed. The revenue mix of organic producers is systematically inefficient as both male and female producers rely too heavily on revenue from organic markets relative to conventional outlets.
Tipo: Conference Paper or Presentation Palavras-chave: Organic farming; Stochastic frontier; Technical efficiency; Allocative efficiency; Farm Management; Marketing; D21; C31; Q01.
Ano: 2011 URL: http://purl.umn.edu/103365
Imagem não selecionada

Imprime registro no formato completo
Assessing the Technical and Allocative Efficiency of U.S. Organic Producers AgEcon
Park, Timothy A.; Lohr, Luanne.
We develop measures of technical and allocative efficiency of producers in marketing certified organic products. A stochastic output distance frontier and the associated revenue share equations are estimated using comprehensive U.S. data on certified organic producers. Farm-level measures of technical efficiency are calculated and factors that enhance performance are identified. Factors that systematically influence allocative efficiency are assessed. The revenue mix of organic producers is systematically inefficient as both male and female producers rely too heavily on revenue from organic markets relative to conventional outlets.
Tipo: Journal Article Palavras-chave: Organic farming; Stochastic frontier; Technical and allocative efficiency; Agribusiness; Farm Management; Marketing; Production Economics; Productivity Analysis; Public Economics; D21; C31; Q01.
Ano: 2010 URL: http://purl.umn.edu/90678
Imagem não selecionada

Imprime registro no formato completo
ATTRIBUTES OF IDEAL SOIL SUBSTITUTES: RESULTS OF A SURVEY OF DEMAND SECTORS AgEcon
Lohr, Luanne.
This paper describes preferences for attributes of ideal soil substitutes reported by industry demand segments, and relates those attributes to willingness to pay for soil substitutes. Regression results on principal components indicate that concern over product stability, safety and environmental protection induce higher willingness to pay for ideal soil products.
Tipo: Working or Discussion Paper Palavras-chave: Compost; Markets; Principal components; Product attributes; Demand and Price Analysis; Farm Management.
Ano: 1996 URL: http://purl.umn.edu/16719
Imagem não selecionada

Imprime registro no formato completo
BENCHMARKING ORGANIZATIONAL PERFORMANCE OF UNIVERSITY EXTENSION: A STOCHASTIC FRONTIER APPROACH AgEcon
Lohr, Luanne; Park, Timothy A..
A stochastic frontier model is used to explain the performance evaluation of U.S. university extension providers by organic producers. The model makes explicit the nonmanagerial factors that influence both performance ratings and performance efficiency, defined as achieving a rating as close to the "best" rating as possible. Results indicate that extension agents are performing at relatively high mean efficiency of 0.92, but that the average rating is relatively low at 2.66 on a four-point scale. Several sources of potential bias in ratings are identified as a way for managers to more accurately conduct individual performance assessments. Programmatic changes to emphasize more collaborative research and training are suggested by the positive effects on...
Tipo: Working or Discussion Paper Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2004 URL: http://purl.umn.edu/16721
Imagem não selecionada

Imprime registro no formato completo
CERTIFICATION AND SUPPLY RESPONSE IN THE ORGANIC LETTUCE MARKET AgEcon
Lohr, Luanne; Park, Timothy A..
The impact of supply relationships and certification programs on the organic lettuce market is examined using an integrated partial adjustment and asymmetric supply response model. Costs associated with organic certification, production, and marketing have not restricted producers’' abilities to respond to price signals. Organic growers allocate output between certified and noncertified markets in response to changing price premiums. Estimates of short-run supply elasticities indicate that organic lettuce growers are more responsive to price changes than producers of nonorganic lettuce. Long-run elasticity has increased since 1988, a change that coincides with the market entry of larger producers.
Tipo: Journal Article Palavras-chave: Crop Production/Industries; Industrial Organization.
Ano: 1992 URL: http://purl.umn.edu/30948
Imagem não selecionada

Imprime registro no formato completo
CONSUMER EFFECTS OF HARMONIZING INTERNATIONAL STANDARDS FOR TRADE IN ORGANIC FOODS AgEcon
Lohr, Luanne; Krissoff, Barry.
Even if governments agree on equivalency of organic standards across countries, consumers may still believe domestically produced organic foods are superior to imports. We simulated a partial equilibrium model of trade in organic wheat between the United States and Germany to illustrate the welfare gains and losses associated with international harmonization of organic standards. Six cases were examined - no equivalency in standards (the status quo), equivalency of standards with complete and incomplete import acceptance, exporters certifying in importing country with complete and incomplete import acceptance, and exporters paying educational costs, with incomplete import acceptance. Results demonstrate that importing country consumers are better off if...
Tipo: Working or Discussion Paper Palavras-chave: International Relations/Trade.
Ano: 2001 URL: http://purl.umn.edu/16726
Imagem não selecionada

Imprime registro no formato completo
CONVERSION SUBSIDIES FOR ORGANIC PRODUCTION: RESULTS FROM SWEDEN AND LESSONS FOR THE UNITED STATES AgEcon
Lohr, Luanne; Salomonsson, Lennart.
Environmental and social justifications for organic conversion subsidies are as pervasive in the United States as in Europe, but national policy does not explicitly support organic agriculture. Using Sweden's experience, we analyze factors that affect whether a subsidy is required to motivate organic conversion. We use a utility difference model to compare farmers who converted before and after the subsidy. Significant factors in conversion without subsidies are greater livestock diversity and more sales outlets. Farmers requiring subsidies manage larger farms, are more concerned with organic inspection quality and adequacy of technical advice, and reside in areas with more organic farms. Results suggest that a subsidy induces mainly those already...
Tipo: Working or Discussion Paper Palavras-chave: Organic agriculture; Utility difference model; Public policy; Agricultural and Food Policy; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/16640
Imagem não selecionada

Imprime registro no formato completo
Demand for Private Marketing Expertise by Organic Farmers: A Quantile Analysis Based on Counts AgEcon
Lohr, Luanne; Park, Timothy A..
We study the demand by organic farmers for technical advice using a quantile regression for the demand of organic farmers for consultations with private information providers. There is substantial heterogeneity in the impact of critical explanatory variables on consultations of organic farmer. Larger farm size has a positive effect on contacts, but the effect is absent for the highest number of consultations. Internet use has a positive marginal effect on visits to private information providers across each quantile, suggesting that expanded efforts to deliver programs through web-based resources are a useful investment for information providers.
Tipo: Article Palavras-chave: Organic farming; Technical assistance; Quantile regression model; Count data; Internet access; Marketing; C25; Q12; Q13; Q16.
Ano: 2012 URL: http://purl.umn.edu/123784
Imagem não selecionada

Imprime registro no formato completo
DIVERSITY OF SOURCES FOR FRESH PRODUCE: IMPLICATIONS FOR LOCAL MARKETS AgEcon
Lohr, Luanne; Hanson, Steven D..
Number of suppliers, approximation of equal-shares market condition and market share held by in-state sources were calculated to determine diversity of sources for 10 fresh fruits and vegetables in eight U.S. wholesale markets. Specificity of growing conditions is associated with few supply sources, unequal market shares and limited purchases from in-state suppliers. For crops with few sources, lower perishability and greater transportability are correlated with greater balance in market shares. For crops with many supply sources, greater perishability and greater transportability are consistent with large market share from imports. Diversity across all commodities can increase market share for local producers.
Tipo: Journal Article Palavras-chave: Concentration index; Fruits and vegetables; Source diversity; Marketing.
Ano: 1995 URL: http://purl.umn.edu/15274
Imagem não selecionada

Imprime registro no formato completo
DYNAMIC ANALYSIS OF A RESIDUE MANAGEMENT SYSTEM IN COTTON AgEcon
Paudel, Krishna P.; Lohr, Luanne.
Residue management system (RMS) offers increase productivity gain to farmers by increasing the organic matter. Farmers have failed to realize this gain and consequently have not adopted RMS in cotton cultivation. Benefit of adopting RMS system appears sooner than farmers would think.
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy; Productivity Analysis.
Ano: 1998 URL: http://purl.umn.edu/20794
Imagem não selecionada

Imprime registro no formato completo
DYNAMIC ECONOMIC ANALYSIS OF A RESIDUE MANAGEMENT SYSTEM IN COTTON AgEcon
Paudel, Krishna P.; Lohr, Luanne.
Residue management system (RMS), comprised of no till cultivation, a winter cover crop, and poultry litter, could be an alternative to existing management system in cotton production in the Georgian Piedmont. We compare the productivity and profitability of RMS with the current system over time, focusing on the role of organic matter. Using dynamic bioeconomic modelling technique, we show that the net return and land value difference between these two systems increase as the terminal period increases. We conclude that if financial and capital markets based on organic matter work efficiently, farmers will choose RMS in cotton production.
Tipo: Working or Discussion Paper Palavras-chave: Residue management; Organic matter; Productivity; Crop Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/16677
Imagem não selecionada

Imprime registro no formato completo
ECONOMIC EFFECT OF IMPERFECT INFORMATION ON CONSERVATION DECISIONS AgEcon
Paudel, Krishna P.; Lohr, Luanne.
Cotton farmers in the Piedmont region incorrectly believe conservation systems with winter cover crop and no-till cultivation yield less than conventional systems. We model the effect of organic matter on productivity and show how ignoring this effect causes returns to be underestimated. Farmers with imperfect information underinvest in residue management.
Tipo: Working or Discussion Paper Palavras-chave: Residue management; Organic matter; Productivity; Comparative statics; Farm Management; Land Economics/Use; Productivity Analysis.
Ano: 1996 URL: http://purl.umn.edu/16645
Imagem não selecionada

Imprime registro no formato completo
EFFECT OF RISK PERSPECTIVE ON FERTILIZER CHOICE BY SHARECROPPERS AgEcon
Paudel, Krishna P.; Lohr, Luanne; Martin, Neil R., Jr..
Peanut and corn are two major crops in the tri-state area of the Southeast US, an area encompassing North Florida, Southwest Georgia, and Southeast Alabama. Sharecroppers in this region apply higher amount of input in crop production than the average farmers. We analyzed the behavior of sharecroppers in this region with regard to their fertilizer application decisions. Two hypotheses were formulated and tested based on sharecroppers' fertilizer application decisions: one assuming that sharecroppers are risk averse farmers and the other assuming that sharecroppers are regret minimizers. Our results show that a sharecropper uses different fertilizer treatments when minimizing risk depending on risk perspective and desired income. Sharecroppers who apply...
Tipo: Working or Discussion Paper Palavras-chave: Southeast U.S.; Sharecroppers; Regret minimizer; Risk averse; Peanut-Corn rotation; Farm Management; Risk and Uncertainty.
Ano: 2000 URL: http://purl.umn.edu/23814
Imagem não selecionada

Imprime registro no formato completo
EMERGENCE OF U.S. ORGANIC AGRICULTURE: CAN WE COMPETE? AgEcon
Klonsky, Karen; Tourte, Laura; Thompson, Gary D.; Lohr, Luanne; Krissoff, Barry.
This compilation of papers for principal papers session PP-03 at the AAEA 1998 Annual Meeting assesses the current status of the organic agriculture industry in the United States. Paper topics address production, market and certification issues faced by the industry, research challenges and emerging conditions shaping domestic and international markets.
Tipo: Working or Discussion Paper Palavras-chave: Production; Marketing; Industry structure; International trade; Certification; Organic agriculture; Industrial Organization; International Relations/Trade; Marketing; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/16704
Imagem não selecionada

Imprime registro no formato completo
EMERGING RURAL FARM-NONFARM CONFLICTS: WHOSE PREFERENCES COUNT? AgEcon
Lohr, Luanne; Harvey, Lynn R..
Tipo: Conference Paper or Presentation Palavras-chave: Community/Rural/Urban Development.
Ano: 1992 URL: http://purl.umn.edu/17187
Imagem não selecionada

Imprime registro no formato completo
FACTORS AFFECTING INTERNATIONAL DEMAND AND TRADE IN ORGANIC FOOD PRODUCTS AgEcon
Lohr, Luanne.
This paper describes important markets for organic foods in Europe, Japan, and North America. The effects on demand of price premiums, distribution channels, consumer characteristics, and key consumer issues (price-quality trade off, country of origin, GMO content, and social process) are discussed.
Tipo: Working or Discussion Paper Palavras-chave: International Relations/Trade.
Ano: 2001 URL: http://purl.umn.edu/16674
Imagem não selecionada

Imprime registro no formato completo
Forecasting Organic Food Prices: Emerging Methods for Testing and Evaluating Conditional Predictive Ability AgEcon
Gubanova, Tatiana; Lohr, Luanne; Park, Timothy A..
Organic farmers, wholesalers, and retailers need price forecasts to improve their decision-making practices. This paper presents a methodology and protocol to select the best performing method from several time and frequency domain candidates. Weekly farmgate prices for organic fresh produce are used. Forecasting methods are evaluated on the basis of an aggregate accuracy measure and several out-of-sample predictive ability tests. A seasonal autoregressive method is recommended for all planning horizons. The role of better price forecasts for the agents who deal in less common organic produce is highlighted. A confirmation for the claim that the organic produce industry needs better farmgate price forecasts to grow is provided.
Tipo: Conference Paper or Presentation Palavras-chave: Demand and Price Analysis.
Ano: 2005 URL: http://purl.umn.edu/19045
Imagem não selecionada

Imprime registro no formato completo
Forecasting Organic Food Prices: Testing and Evaluating Conditional Predictive Ability AgEcon
Park, Timothy A.; Gubanova, Tatiana; Lohr, Luanne; Escalante, Cesar L..
Organic farmers, wholesalers, and retailers need reliable price forecasts to improve their decision- making practices. This paper presents a methodology and protocol to select the best-performing method from several time and frequency domain candidates. Weekly farmgate prices for organic fresh produce are used. Forecasting methods are evaluated on the basis of an aggregate accuracy measure and several out-of-sample predictive ability tests. Combining forecasts to improve on individual forecasts is investigated.
Tipo: Conference Paper or Presentation Palavras-chave: Demand and Price Analysis.
Ano: 2005 URL: http://purl.umn.edu/19412
Imagem não selecionada

Imprime registro no formato completo
FROM THE PERSPECTIVE OF GLOBAL WARMING: ALTERNATIVE FARMING SYSTEMS AND SUSTAINABILITY AgEcon
Paudel, Krishna P.; Lohr, Luanne.
According to Article 3.4 of the Kyoto Protocol, agricultural soil could be used as a sink for carbon sequestration. Soil sequestration of carbon provides dual benefits: an increase in soil productivity and a reduction in atmospheric carbon concentration. The gain in soil productivity is a slow process and attaining a steady-state level of carbon in soil takes several years. A frequently encountered difficulty in this situation is how to discount the future benefit of carbon sequestration into a current term. We compared the net benefit of four alternative management systems using discount rates based on the sliding gamma distribution, market rate of investment, and the social rate of time preference. We also calculated the sustainability of these alternate...
Tipo: Working or Discussion Paper Palavras-chave: Carbon sequestration; Conservation practices; Strong and weak sustainability; Discounting method; Environmental Economics and Policy; Production Economics.
Ano: 2002 URL: http://purl.umn.edu/31656
Registros recuperados: 44
Primeira ... 123 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional