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AN ECONOMETRIC ANALYSIS OF DEMAND FOR MEAT AND FISH PRODUCTS IN KOREA AgEcon
Jung, Jione; Koo, Won W..
This study analyzes the structure of Korean meat and fish product demand. The Linear Approximate Almost Ideal Demand System (LA/AIDS) is used to estimate Korean meat and fish demand. Since the expenditure term is endogenous, the three-stage least squares (3SLS) estimator is used to estimate the demand system. Empirical results indicate that beef imports would increase with increases in per capita income. If imported beef becomes less expensive as a result of the trade liberalization policy adopted by the Korean government, Hanwoo beef would not be competitive and could lose its market share. Pork and chicken would be able to maintain market shares, but most fish products would lose market shares.
Tipo: Working or Discussion Paper Palavras-chave: Demand; Almost ideal demand system; Meat; Fish; Endogeneity; Rotterdam model; Separabiilty; Estimator; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2000 URL: http://purl.umn.edu/23122
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An Empirical Assessment of Endogeneity Issues In Demand Analysis for Differentiated Products AgEcon
Dhar, Tirtha Pratim; Chavas, Jean-Paul; Gould, Brian W..
This article explores the issue of price and expenditure endogeneity in empirical demand analysis. The analysis focuses on the US carbonated soft drink market. We test the null hypothesis that price and expenditures are exogenous in the demand for carbonated soft drinks. Using an Almost Ideal Demand System (AIDS) specification, we strongly reject exogeneity for both prices and expenditures. We find that accounting for price/expenditures endogeneity significantly impacts demand elasticity estimates. We also evaluate the implications of endogeneity issues for testing weak separability.
Tipo: Working or Discussion Paper Palavras-chave: Endogeneity; Separability; Carbonated soft drinks; Almost Ideal Demand System; Demand and Price Analysis.
Ano: 2002 URL: http://purl.umn.edu/25227
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Children’s Consumption of Fruits and Vegetables: Do School Environment and Policies Affect Choice in School Meals? AgEcon
Ishdorj, Ariun; Crepinsek, Mary Kay; Jensen, Helen H..
Considering most children spend a majority of their weekdays at school and, on average, obtain more than one-third of their daily caloric intake from meals consumed at school during the school year, school is a natural place to implement nutrition policies that would help develop healthy eating habits and improve health and well-being of children. At the same time, local school meal policies may influence what foods are offered and how the foods are prepared. In this regard, the U.S. Department of Agriculture’s (USDA) two school meal programs can play an important role in children’s diets and food habit formation and thus positively influence children’s health. The focus of our research is children’s intakes of fruits and vegetables by location of...
Tipo: Presentation Palavras-chave: Food Assistance; Fruits and Vegetables; School Meals; Endogeneity; Censoring; Food Consumption/Nutrition/Food Safety; C11; C34; C36.
Ano: 2012 URL: http://purl.umn.edu/123534
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Determinants of smallholders’ decisions to leave land fallow: the case of Kosovo AgEcon
Sauer, Johannes; Davidova, Sophia; Latruffe, Laure.
The objective of this article is to investigate why farmers in Kosovo leave land fallow when the total land of their farms is small and households, almost fully dependent on farming for their livelihoods, are large. In order to elicit some of the barriers to land utilization, the article uses a comprehensive survey carried out during the agricultural year 2005/2006 to explore agricultural households’ perceptions of production, market conditions, and general security six years after the end of the military conflict in the former Yugoslavia. Several agro-environmental, household and farm characteristics are employed to empirically approximate the significance of different factors for leaving land fallow. Three different econometric models are used to address...
Tipo: Conference Paper or Presentation Palavras-chave: Fallow land decision; Kosovo; Endogeneity; Community/Rural/Urban Development; C24; Q12; Q15.
Ano: 2010 URL: http://purl.umn.edu/94917
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Do Fertilizer Subsidies Affect the Demand for Commercial Fertilizer? An Example from Malawi AgEcon
Ricker-Gilbert, Jacob; Jayne, Thomas S..
Replaced with revised version of paper 07/24/09.
Tipo: Conference Paper or Presentation Palavras-chave: Africa; Fertilizer subsidies; Panel data; Double hurdle model; Endogeneity; Agricultural and Food Policy.
Ano: 2009 URL: http://purl.umn.edu/51606
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Does Duality Theory Hold in Practice? A Monte Carlo Analysis for U.S. Agriculture AgEcon
Rosas, Francisco; Lence, Sergio H..
The Neoclassical theory of production establishes a dual relationship between the profit value function of a competitive firm and its underlying production technology. This relationship, usually referred to as the duality theory, has been widely used in empirical work to estimate production parameters without the requirement of explicitly specifying the technology. We analyze the ability of this approach to recover the underlying production parameters and its effects on estimated elasticities and scale economies measurements, when data available for estimation features typical realistic problems. We design alternative scenarios and compute the data generating process by Monte Carlo simulations, so as to know the true technology parameters as well as to...
Tipo: Conference Paper or Presentation Palavras-chave: Duality theory; Firm’s heterogeneity; Measurement error; Data aggregation; Omitted variables; Endogeneity; Uncertainty; Monte Carlo simulations.; Crop Production/Industries; Production Economics; Risk and Uncertainty; Q12; D22; D81.
Ano: 2011 URL: http://purl.umn.edu/103911
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Does economic endogeneity of site facilities in recreation demand models lead to statistical endogeneity? AgEcon
Chen, Min; Lupi, Frank.
Different kinds of endogeneity problems in Random Utility Models of recreation demand have been studied in previous literature. Some site characteristics, like facilities, could be endogenous in an economic sense due to the interplay of supply and demand. That is, it may be that more popular recreation sites tend to have better site characteristics since managers with limited budgets would be more willing to invest in them. If recreation site improvements are more likely to occur at the more popular sites, then might this economic endogeneity cause problems for econometric models linking site demand to facilities. In this paper, we use Monte Carlo simulations to test whether this economic endogeneity will lead to statistical endogeneity.
Tipo: Conference Paper or Presentation Palavras-chave: Random Utility Models; Facilities; Endogeneity; Monte Carlo simulations; Environmental Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/49449
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Does Economic Endogeneity of Site Facilities in Recreation Demand Models Lead to Statistical Endogeneity? AgEcon
Chen, Min.
Random Utility Models of recreation demand are widely used to relate demand and value to the characteristics of recreation sites. Although some kinds of endogeneity problems have been studied in previous literature, no study has addressed the potential problem with site characteristics that are endogenously supplied. Some site characteristics, like facilities, could be endogenous in an economic sense due to the interplay of supply and demand. That is, more popular recreation sites tend to have better site characteristics since managers with limited budgets would be more willing to invest in them. If recreation site improvements are more likely to occur at the more popular sites, then this economic endogeneity might cause problems for econometric models...
Tipo: Thesis or Dissertation Palavras-chave: Random Utility Maximization models; Facilities; Endogeneity; Monte Carlo simulations; Environmental Economics and Policy; Q51.
Ano: 2009 URL: http://purl.umn.edu/55808
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Econometric Analysis of the Effects of Subsidies on Farm Production in Case of Endogenous Input Quantities AgEcon
Henningsen, Arne; Kumbhakar, Subal C.; Lien, Gudbrand D..
Replaced with revised version of paper 07/29/09.
Tipo: Conference Paper or Presentation Palavras-chave: Panel data; Subsidies; Household model; Endogeneity; Norwegian grain farming; Agricultural and Food Policy; Consumer/Household Economics; Production Economics.
Ano: 2009 URL: http://purl.umn.edu/49728
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Enhanced routines for instrumental variables/generalized method of moments estimation and testing AgEcon
Baum, Christopher F.; Schaffer, Mark E.; Stillman, Steven.
We extend our 2003 paper on instrumental variables and generalized method of moments estimation, and we test and describe enhanced routines that address heteroskedasticity- and autocorrelation-consistent standard errors, weak instruments, limited-information maximum likelihood and k-class estimation, tests for endogeneity and Ramsey’s regression specification-error test, and autocorrelation tests for instrumental variable estimates and panel-data instrumental variable estimates.
Tipo: Article Palavras-chave: Ivactest; Ivendog; Ivhettest; Ivreg2; Ivreset; Overid; Ranktest; Instrumental variables; Weak instruments; GMM; Endogeneity; Heteroskedasticity; Serial correlation; HAC standard errors; LIML; CUE; Overidentifying restrictions; Frisch–Waugh–Lovell theorem; RESET; Cumby–Huizinga test; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119291
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Estimating the Link Function in Multinomial Response Models under Endogeneity and Quadratic Loss AgEcon
Judge, George G.; Mittelhammer, Ronald C..
This paper considers estimation and inference for the multinomial response model in the case where endogenous variables are arguments of the unknown link function. Semiparametric estimators are proposed that avoid the parametric assumptions underlying the likelihood approach as well as the loss of precision when using nonparametric estimation. A data based shrinkage estimator that seeks an optimal combination of estimators and results in superior risk performance under quadratic loss is also developed.
Tipo: Working or Discussion Paper Palavras-chave: Multinomial Process; Endogeneity; Empirical likelihood procedures; Quadratic loss; Semiparametric estimation and inference; Data dependent shrinkage; Asymptotic and finite sample risk; Research Methods/ Statistical Methods; C10; C24.
Ano: 2004 URL: http://purl.umn.edu/25095
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Excess Capital in Agricultural Production AgEcon
Kumbhakar, Subal C.; Guan, Zhengfei; Oude Lansink, Alfons G.J.M..
In this article we propose a theoretical model for analyzing capital requirement in agricultural production and define excess capital thereupon. We develop a two-step method that allows endogenous regressors in the maximum likelihood estimation. The two-step procedure is also capably of recovering the parameters of time invariant variables in fixed effect models. The model and method are applied to a capital requirement study using data from cash crop farms in the Netherlands. Empirical results show that excess capital widely exists on the farm. The implications of excess capital are further demonstrated with a production frontier analysis.
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural production; Capital requirement; Endogeneity; Excess capital; Fixed effect; Maximum likelihood estimation; Stochastic frontier; Production Economics.
Ano: 2007 URL: http://purl.umn.edu/9813
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Farmers' Perceptions about Spatial Yield Variability and Precision Farming Technology Adoption: An Empirical Study of Cotton Production in 12 Southeastern States AgEcon
Kotsiri, Sofia; Rejesus, Roderick M.; Marra, Michele C.; Velandia, Margarita M..
This paper examines how cotton farmers' perceptions about their spatial yield variability influence their decision to adopt precision farming technologies. Utilizing cross-section survey data from 12 Southeastern states and a two-step econometric modeling approach, we find that farmers who perceive their yields as more spatially heterogeneous will more likely use site specific information gathering technologies and apply their inputs at a variable rate. In addition, our empirical analysis shows that perceptions about future profitability and importance of precision farming, along with socio-economic factors, also drive the technology adoption decision. These results have implications for producers contemplating the variable rate management decisions, as...
Tipo: Conference Paper or Presentation Palavras-chave: Multinomial logit; Endogeneity; Variable rate input applications; Site specific information gathering technology; Yield perceptions; Agribusiness; Farm Management; Production Economics; Productivity Analysis; Q12; Q16.
Ano: 2011 URL: http://purl.umn.edu/98689
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Genetically Modified Crops and Labor Savings in US Crop Production AgEcon
Gardner, Justin G.; Nelson, Carl H..
In spite of widespread adoption there is mixed evidence as to whether or not adopting Genetically Modified (GM) crops increase farm welfare. One possible reason for widespread adoption is labor savings. Using a treatment effect model we estimate the labor savings associated with adopting a GM crop.
Tipo: Conference Paper or Presentation Palavras-chave: Genetically modified crops; Agricultural biotechnology; Endogeneity; Treatment effects; Survey weights; Crop Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/34919
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Health Insurance and Joint Off‐Farm Labor Allocation Decisions of Farm Families AgEcon
D'Antoni, Jeremy M.; Mishra, Ashok K..
Contact author to request a copy of this paper.
Tipo: Presentation Palavras-chave: Health insurance coverage; Endogeneity; Copula; Off-farm labor supply; Dependence; Bivariate tobit; Coupled farm programs payments; Decoupled farm program payments; Agribusiness; Farm Management; Food Security and Poverty; Labor and Human Capital; Public Economics; C34; I13; J12; J22; J38; J43; Q12; Q18.
Ano: 2012 URL: http://purl.umn.edu/119646
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HOW DIFFERENTLY DO THE AGRICULTURAL AND INDUSTRIAL SECTORS RESPOND TO EXCHANGE RATE FLUCTUATION? AgEcon
Kim, MinKyoung; Koo, Won W..
This study divides the U.S. economy into the agricultural and industrial sectors and compares the degree of involvement of exchange rates in each sector without specifying the rigid assumption of either exogeneity or endogeneity of exchange rates. Both short- and long-run impacts of shocks in the exchange rate are found to be significant. However, the effect of an exchange rate shock on the agricultural sector is larger than that on the industrial sector. This study examines a fundamental question about the role of the exchange rate in the two sectors. The exchange rate is exogenous in the agricultural sector, while being endogenous in the industrial sector.
Tipo: Working or Discussion Paper Palavras-chave: Role of exchange rates; Endogeneity; Exogeneity; Over-identification; Short- and long-run impulse response.; International Relations/Trade.
Ano: 2002 URL: http://purl.umn.edu/23589
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Impact of HIV/AIDS-Related Deaths on Rural Farm Households' Welfare in Zambia: Implications for Poverty Reduction Strategies AgEcon
Chapoto, Antony; Jayne, Thomas S..
Using comprehensive rural farm household longitudinal data from Zambia, this paper measures the impacts of prime-age (PA) adult morbidity and mortality on crop production and cropping patterns, household size, livestock and non-farm income. The paper adopts and extends the counterfactual (difference-in-difference) approach by controlling for initial (pre-death) household conditions that may influence the severity of the impacts of adult mortality. In particular, the study controls for initial poverty status, landholding size, effective dependency ratios, and the gender and position of the deceased person. Moreover, the possibility that PA death in the household is endogenous is taken into account by conceptualizing the measurement of effects of...
Tipo: Report Palavras-chave: Food security; Food policy; HIV/AIDS; Prime-age mortality; Endogeneity; Rural livelihoods; Food Security and Poverty; Health Economics and Policy; Q18.
Ano: 2005 URL: http://purl.umn.edu/54473
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Instrumental variables and GMM: Estimation and testing AgEcon
Baum, Christopher F.; Schaffer, Mark E.; Stillman, Steven.
We discuss instrumental variables (IV) estimation in the broader context of the generalized method of moments (GMM), and describe an extended IV estimation routine that provides GMM estimates as well as additional diagnostic tests. Stand-alone test procedures for heteroskedasticity, overidentification, and endogeneity in the IV context are also described.
Tipo: Journal Article Palavras-chave: Instrumental variables; Generalized method of moments; Endogeneity; Heteroskedasticity; Overidentifying restrictions; Clustering; Intra-group correlation; Research Methods/ Statistical Methods.
Ano: 2002 URL: http://purl.umn.edu/116029
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ISSUES OF DEMAND SPECIFICATION AND INDUSTRY STRUCTURE IN TURKEYS AND BROILER CHICKENS AgEcon
Cheney, Laura Martin; Brown, A. Blake; Yamano, Takashi; Masterovsky, Michael.
Factors unique to the turkey industry suggest that conclusions concerning market structure and demand specification drawn from aggregate poultry data cannot necessarily be extrapolated to the turkey industry. The Wu-Hausman endogeneity test is used to examine demand specifications and industry structure specifically for turkey meat. In contrast to general poultry, quantity-not price-is found to be predetermined in demand models that use annual turkey data. Quarterly demand analysis suggests this result stems from biological cycles that limit a producer's ability to react to price change and the use of a weighted average for determining price and quantity.
Tipo: Journal Article Palavras-chave: Demand analysis; Endogeneity; Market structure; Poultry industry; Turkeys; Demand and Price Analysis; Livestock Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/15290
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Jackknife instrumental variables estimation in Stata AgEcon
Poi, Brian P..
The two-stage least-squares (2SLS) instrumental variables estimator is commonly used to address endogeneity. However, the estimator suffers from bias that is exacerbated when the instruments are only weakly correlated with the endogenous variables and when many instruments are used. In this article, I discuss jackknife instrumental variables estimation as an alternative to 2SLS. Monte Carlo simulations comparing the jackknife instrument variables estimators to 2SLS and limited information maximum likelihood (LIML) show that two of the four variants perform remarkably well even when 2SLS does not. In a weak-instrument experiment, the two best performing jackknife estimators also outperform LIML.
Tipo: Journal Article Palavras-chave: Jive; 2SLS; LIML; JIVE; Instrumental variables; Endogeneity; Weak instruments; Research Methods/ Statistical Methods.
Ano: 2006 URL: http://purl.umn.edu/117586
Registros recuperados: 30
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