Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 26
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A REGIONAL ECONOMETRIC MODEL OF U.S. APPLE PRODUCTION AgEcon
Roosen, Jutta.
A four-region econometric model of U.S. apple production and consumption is developed. Technical progress has benefited growers in the Northwest the most, but prices there are much lower in comparison to other regions. Estimated elasticities are used to estimate national and regional welfare impacts of pesticide cancellations.
Tipo: Conference Paper or Presentation Palavras-chave: Apple; Econometrics; Regional; Three-stage least square; Crop Production/Industries; Research Methods/ Statistical Methods.
Ano: 1999 URL: http://purl.umn.edu/21663
Imagem não selecionada

Imprime registro no formato completo
A REGIONAL ECONOMETRIC MODEL OF U.S. APPLE SUPPLY AND DEMAND AgEcon
Roosen, Jutta.
An econometric model of U.S. apple supply and demand is estimated using annual data for 1971-1997. Supply is arranged into four geographical regions, the Northwest, the Southwest, the Central, and the East. The structural model consists of five components: supply, allocation between fresh and processed utilization, pricing, demand and net imports. Estimated supply elasticities illustrate regional differences in growers' ability to respond to market changes.
Tipo: Working or Discussion Paper Palavras-chave: Apple; Econometrics; Regional; Three-stage least square; Crop Production/Industries; Demand and Price Analysis.
Ano: 1999 URL: http://purl.umn.edu/18237
Imagem não selecionada

Imprime registro no formato completo
Adjustment of Wheat Production to Market Reform in Egypt AgEcon
Kherallah, Mylene; Minot, Nicholas; Gruhn, Peter.
In response to slow growth in the agricultural sector and as part of a general shift towards a more market-oriented economy, the Government of Egypt started liberalizing the agricultural sector in 1987. Controls over wheat production and marketing were eliminated and wheat producer prices were brought closer to international levels. As a result, there has been remarkable increases in wheat crop area and yields, causing wheat production to triple from 1986 to 1998. This study analyzes the results of a survey of 800 Egyptian wheat farmers in order to address three issues that are of interest to agricultural reform policy in Egypt. First, what are the patterns in wheat production and marketing that have emerged following the economic reforms? Second, why is...
Tipo: Working or Discussion Paper Palavras-chave: Small farmer; Wheat yields; Egypt; Econometrics; Agricultural policy; Crop Production/Industries.
Ano: 1999 URL: http://purl.umn.edu/97384
Imagem não selecionada

Imprime registro no formato completo
AN AUTOMATED ECONOMETRIC APPROACH FOR ESTIMATING AND REPORTING DAILY COTTON MARKET PRICES AgEcon
Brown, Jeff E.; Ethridge, Don E.; Hudson, Darren; Engels, Carlos.
An automated price reporting system developed through computer technology and hedonic price theory is used to estimate daily cotton market prices, premiums, and discounts. This objective approach for reporting cotton market prices was developed to complement the objective measures of high volume instrument grading of cotton. The computerized, econometric system is limited to the Texas and Oklahoma marketing regions where sales are readily available from electronic markets. The econometric based system has shown all the characteristics of an efficient price reporting system; it is accurate, reliable, consistent, and repeatable in its working process and price estimates.
Tipo: Journal Article Palavras-chave: Computer automation; Cotton marketing; Econometrics; Hedonic price analysis; Price reporting; Crop Production/Industries; Marketing.
Ano: 1995 URL: http://purl.umn.edu/15264
Imagem não selecionada

Imprime registro no formato completo
An Econometric Analysis of the Environmental Benefits Provided by the Conservation Reserve Program AgEcon
Fleming, Ronald A..
Over $1.7 billion has been spent on the Conservation Reserve Program (CRP) since 1985. The purpose of this study is to show that these expenditures have aided the environment. Rather than quantify changes in environmental variables, a spatial econometric model is used to test if CRP enrollments are greater in counties with poorer environmental quality. In seven of nine regions, CRP enrollments are higher in counties with an environmental concern. This positive finding justifies past expenditures by the CRP and supports continued funding as an environmental program. The CRP is targeting current environmental concerns that will lead to future improvement.
Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Econometrics; Environmental quality; Soil erosion; Spatial data; Water quality; Wildlife habitat; Q28; Q58; C31; Q24; Q25.
Ano: 2004 URL: http://purl.umn.edu/43388
Imagem não selecionada

Imprime registro no formato completo
Análise da co-integração entre a pecuária de leite e corte em Mato Grosso. Repositório Alice
MICHETTI, M.; REIS, J. C. dos; KAMOI, M. Y. T.; LOPES, L. B..
Resumo: A pecuária de corte em Mato Grosso é referência nacional, destacando-se entre outros fatores pelo tamanho de seu rebanho. Todavia sua pecuária leiteira vem perdendo participação no cenário doméstico. Invariavelmente, a atividade de corte e leite tem relação intrínseca no estado, onde os ciclos da pecuária de corte são fatores determinantes para explicar a produção e o preço do leite. Isso é observado na presença de uma relação de curto prazo mais intensa entre a produção de leite com seu preço, como esperado, mas também com o preço do bezerro e com o da @ do boi gordo. O efeito da resposta ao impulso na produção de leite mostra que a variável que mais impacta na decisão do produtor em relação à produção de leite é o preço da @ do boi. Choques no...
Tipo: Artigo de periódico Palavras-chave: Pecuária; Econometria; Gado de Corte; Gado Leiteiro; Livestock; Econometrics; Beef cattle; Dairy cattle.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145235
Imagem não selecionada

Imprime registro no formato completo
Análise da co-integração entre a pecuária de leite e corte em Mato Grosso. Repositório Alice
MICHETTI, M.; REIS, J. C. dos; KAMOI, M. Y. T.; LOPES, L. B..
Resumo: A pecuária de corte em Mato Grosso é referência nacional, destacando-se entre outros fatores pelo tamanho de seu rebanho. Todavia sua pecuária leiteira vem perdendo participação no cenário doméstico. Invariavelmente, a atividade de corte e leite tem relação intrínseca no estado, onde os ciclos da pecuária de corte são fatores determinantes para explicar a produção e o preço do leite. Isso é observado na presença de uma relação de curto prazo mais intensa entre a produção de leite com seu preço, como esperado, mas também com o preço do bezerro e com o da @ do boi gordo. O efeito da resposta ao impulso na produção de leite mostra que a variável que mais impacta na decisão do produtor em relação à produção de leite é o preço da @ do boi. Choques no...
Tipo: Artigo de periódico Palavras-chave: Pecuária; Econometria; Gado de Corte; Gado Leiteiro; Livestock; Econometrics; Beef cattle; Dairy cattle.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1146651
Imagem não selecionada

Imprime registro no formato completo
Analyses of Generic Dairy Advertising, 1984-97 AgEcon
Blisard, Noel; Blayney, Donald P.; Chandran, Ram; Allshouse, Jane E..
Generic advertising raised fluid milk sales about 6.0 percent, or 18.1 billion pounds, between September 1984 and September 1997. Sales of cheese rose by about 6.8 billion pounds (milk equivalent) in the same period because of increased generic advertising. An assessment of 15 cents per hundredweight of milk sold commercially, mandated by the Dairy and Tobacco Adjustment Act of 1983, funded the advertising. Activities of the National Fluid Milk Processor Promotion Board also contributed to increased milk sales over the past year. Gross returns to dairy farmers between September 1984 and September 1997 were estimated to increase by $3.44 for each dollar spent on generic advertising.
Tipo: Report Palavras-chave: Cheese; Fluid milk; Advertising; Demand; Entry; Exit; Distributed lag; Econometrics; Simulation; Elasticities; Milk Processor Education Program; Livestock Production/Industries; Marketing.
Ano: 1999 URL: http://purl.umn.edu/33554
Imagem não selecionada

Imprime registro no formato completo
CAN ECONOMETRIC ANALYSIS MAKE (AGRICULTURAL) ECONOMICS A HARD SCIENCE? CRITICAL REMARKS AND IMPLICATIONS FOR ECONOMIC METHODOLOGY AgEcon
Petrick, Martin.
This paper argues that mainstream economics does not follow the positivist research tradition it (often implicitly) claims to follow and expresses some serious doubt that econometrics in particular can make economics a hard science. Mathematical rigour and sophisticated statistical techniques may be regarded as persuasive analytical tools in economics, but their mere application does not guarantee good research practice. The paper outlines an alternative methodological view of pragmatic instrumentalism in which the well known tools of economic analysis can find a new place. Instead of relying on a narrow rule that purports to produce universal truth, this view encourages to increase the target area for questioning and probing. Much more attention is paid...
Tipo: Working or Discussion Paper Palavras-chave: Economic method; Econometrics; Philosophy of science; Pragmatic instrumentalism; Research Methods/ Statistical Methods; B41; C10.
Ano: 2004 URL: http://purl.umn.edu/14911
Imagem não selecionada

Imprime registro no formato completo
DEALING WITH HEALTH CONCERNS IN NATURAL RESOURCE DAMAGE ASSESSMENT AgEcon
Hite, Diane; Hoehn, John P.; Randall, Alan.
We employ a combination of survey design and econometric techniques to explore ways to deal with health concerns in restoration projects where environmental injuries are severe. We use data from a referendum contingent valuation survey for a natural resource restoration project to demonstrate the extent to which health concerns can be controlled.
Tipo: Conference Paper or Presentation Palavras-chave: Contingent valuation; Environmental economics; Research methods; Econometrics; Statistics; Environmental Economics and Policy; Health Economics and Policy; Research Methods/ Statistical Methods.
Ano: 1999 URL: http://purl.umn.edu/21652
Imagem não selecionada

Imprime registro no formato completo
DEMAND ESTIMATION FOR AGRICULTURAL PROCESSING CO-PRODUCTS AgEcon
Wachenheim, Cheryl J.; Novak, Patrick J.; DeVuyst, Eric A.; Lambert, David K..
Co-products of processing agricultural commodities are often marketed through private transaction rather than through public markets or those in which public transaction information is recorded or available. The resulting lack of historical price information prohibits the use of positive time series techniques to estimate demand. Demand estimates for co-products are of value to both livestock producers, who obtain them for use in livestock rations, and processors, who must sell or otherwise dispose of them. Linear programming has long been used, first by researchers and later as a mainstream tool for nutritionists and producers, to formulate least-cost livestock rations. Here it is used as a normative technique to estimate step function demand...
Tipo: Working or Discussion Paper Palavras-chave: Co-products; Demand estimation; Econometrics; Linear programming; Agribusiness.
Ano: 2001 URL: http://purl.umn.edu/23488
Imagem não selecionada

Imprime registro no formato completo
Does Health Information Matter for Modifying Consumption? A Field Experiment Measuring the Impact of Risk Information on Fish Consumption AgEcon
Verger, Philippe; Marette, Stephan; Blanchemanche, Sandrine; Roosen, Jutta.
Replaced with revised version of paper 03/28/07.
Tipo: Working or Discussion Paper Palavras-chave: Econometrics; Field experiment; Fish consumption; Health information; Nutrition; Food Consumption/Nutrition/Food Safety.
Ano: 2006 URL: http://purl.umn.edu/18454
Imagem não selecionada

Imprime registro no formato completo
Economic and climatic models for estimating coffee supply PAB
Moraes-Oliveira,Adriana Ferreira de; Aparecido,Lucas Eduardo de Oliveira; Figueira,Sérgio Rangel Fernandes.
Abstract: The objective of this work was to estimate the coffee supply by calibrating statistical models with economic and climatic variables for the main producing regions of the state of São Paulo, Brazil. The regions were Batatais, Caconde, Cássia dos Coqueiros, Cristais Paulista, Espírito Santo do Pinhal, Marília, Mococa, and Osvaldo Cruz. Data on coffee supply, economic variables (rural credit, rural agricultural credit, and production value), and climatic variables (air temperature, rainfall, potential evapotranspiration, water deficit, and water surplus) for each region, during the period from 2000-2014, were used. The models were calibrated using multiple linear regression, and all possible combinations were tested for selecting the variables....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Climate; Econometrics; Modelling; Rural credit.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201158
Imagem não selecionada

Imprime registro no formato completo
ENTROPY-BASED SEEMINGLY UNRELATED REGRESSION AgEcon
Harmon, Alice; Preckel, Paul V.; Eales, James S..
We adapt the classical SUR procedure to a minimum cross entropy approach to estimate linear systems of equations where the errors across equations are correlated. We conclude that our entropy-based approach may provide a reasonable substitute for SUR in cases where classical methods may not be applied due to shortages of data.
Tipo: Working or Discussion Paper Palavras-chave: Entropy; Econometrics; Seemingly unrelated regression; Research Methods/ Statistical Methods.
Ano: 1998 URL: http://purl.umn.edu/28682
Imagem não selecionada

Imprime registro no formato completo
Estimating a Demand Function for Poultry Litter AgEcon
Carreira, Rita I.; Goodwin, Harold L., Jr..
Excess poultry litter could be a sustainable source of crop nutrients outside of nutrient-saturated regions if crop farmers are willing to utilize it. Using nearly 150 observations of actual poultry litter purchases in Oklahoma, Arkansas, and Missouri we estimate a demand function for poultry litter produced in northwest Arkansas.
Tipo: Conference Paper or Presentation Palavras-chave: Poultry litter; Factor demand estimation; Econometrics; Northwest Arkansas; Demand and Price Analysis.
Ano: 2006 URL: http://purl.umn.edu/21236
Imagem não selecionada

Imprime registro no formato completo
Estimating A Farm Group Model and Input Allocations Using Accountancy Data AgEcon
Gocht, Alexander; Heckelei, Thomas.
This paper proposes and applies an innovative estimation approach for farm group programming models using Generalised Maximum Entropy. The proposed set-up simultaneously determines calibrating cost function parameters and input allocations to production activities. The methodology is applied to Belgium FADN data of arable farms for which available input allocations allow to validate the estimation approach. Results outperform separate estimates of input allocations previously applied in the literature and this finding is robust with respect to support point design.
Tipo: Conference Paper or Presentation Palavras-chave: Mathematical programming; Input allocation; Production economics; Econometrics; GME; PMP; Agricultural and Food Policy; Farm Management; Land Economics/Use; Production Economics.
Ano: 2010 URL: http://purl.umn.edu/61393
Imagem não selecionada

Imprime registro no formato completo
EU policy reform simulation based on panel data estimation of on- and off-farm labour supply equations for Dutch dairy farmers AgEcon
Ooms, Daan L.; Hall, Alastair R..
This research focuses on the estimation of labour supply equations for Dutch dairy farmers that are suitable for policy simulations. Data availability leads to the fact that we can not estimate structural labour supply equations. We show how to derive reduced form equations suitable for policy simulations. In this research we use the panel data sample selection estimation approach of Kyriazidou (1997) and Wooldridge (1995) to estimate the off-farm labour supply equation. The two lead to different estimation results and different simulation results based on these.
Tipo: Conference Paper or Presentation Palavras-chave: Econometrics; Panel Data; Sample Selection; Labour Supply; CAP Reform; Labor and Human Capital; C23; C24; C51; C53; D13; J22; Q12; Q18.
Ano: 2005 URL: http://purl.umn.edu/19434
Imagem não selecionada

Imprime registro no formato completo
Há Convergência do PIB per capita da agropecuária no Brasil entre 1980 a 2004? AgEcon
Spohr, Gabriela; Freitas, Clailton Ataides.
Este artigo tem como objetivo a realização dos testes de hipóteses de convergência absoluta, condicional e sigma convergência, das taxas de crescimento per capita da agropecuária dos Estados brasileiros, ao longo do período de 1980 a 2004. Esses modelos foram testados contemplando a estrutura de dados em painel. Os testes econométricos apontam um processo de convergência absoluta e quando condicionada ao capital humano a convergência torna-se mais acentuada. Contudo, as estimativas não mostram a existência de convergência sigma. This article has the objective to accomplisher by the hypothesis test convergence absolut, conditional and sigma convergence of GDP growth per capita in the farming field for the brasilian states in the period of 1980 to 2004....
Tipo: Conference Paper or Presentation Palavras-chave: Convergência; Agricultura; Econometria; Convergence; Agriculture; Econometrics; Agricultural Finance; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/102474
Imagem não selecionada

Imprime registro no formato completo
Influence of Climate Variability on the Market Price of Water in the Gila-San Francisco Basin AgEcon
Pullen, Jennifer L.; Colby, Bonnie G..
Emerging water markets in the western United States have slowly developed as usage patterns have changed over time. This article develops an econometric model for the Gila-San Francisco Basin. Results indicate the market price of water has risen in response to drought and market conditions. Analysis shows a statistically significant relationship between the price and quantity of water transferred, year the transaction occurred, location where the transaction occurred, new use of the water right, and whether the transaction occurred during a drought year. Using the Standard Precipitation Index, we find negotiated prices are higher during dry years.
Tipo: Journal Article Palavras-chave: Drought; Econometrics; Hedonic; Market price; Palmer Hydrological Drought Index; Standard Precipitation Index; Water; Western United States; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/46568
Imagem não selecionada

Imprime registro no formato completo
LEAST SQUARES AND ENTROPY AS PENALTY FUNCTIONS AgEcon
Preckel, Paul V..
Mathematical measures of entropy as defined by Shannon (1948) and Kullback and Leibler (1951) are currently in vogue in the field of econometrics, primarily due to the comprehensive work by Golan, Judge, and Miller (1996). In this paper, an alternative interpretation of the entropy measure as a penalty function over deviations is presented. Using this interpretation, a number of parallels are drawn with least squares estimators, and it is demonstrated that, with a minor modification of the traditional least squares estimator, both approaches may be applied to the general linear model. The advantages and disadvantages of each approach are discussed, and a philosophical approach to the selection of estimation technique is suggested.
Tipo: Working or Discussion Paper Palavras-chave: Entropy; Econometrics; Penalty functions; Estimation; Research Methods/ Statistical Methods.
Ano: 1998 URL: http://purl.umn.edu/28625
Registros recuperados: 26
Primeira ... 12 ... 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