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Registros recuperados: 87
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Impact of a Commodity Price Spike on Poverty Dynamics: Evidence from a Panel of Rural Households in Bangladesh AgEcon
Balagtas, Joseph Valdes; Bhandari, Humnath; Mohanty, Samarendu; Cabrera, Ellanie; Hossain, Mahabub.
In this paper we assess the effects of the dramatic rise in agricultural commodity prices during 2007-2008 on income dynamics and poverty among rural households in Bangladesh. We use data from a nationally representative longitudinal survey of rural households in Bangladesh collected in four waves in 1988, 2000, 2004, and 2008. Nargis and Hossain (2006) analysed income dynamics and poverty incidence for the first three waves, finding a declining trend in both the incidence and depth of poverty, aided by in particular by human capital development and the off-farm labor opportunities. Here we update the analysis to include data collected in 2008, at the height of the aforementioned spike in agricultural prices. We find that various measures of rural poverty...
Tipo: Presentation Palavras-chave: Poverty; Income; Commodity price spike; Rural households; Bangladesh; Panel data; Demand and Price Analysis; Food Security and Poverty.
Ano: 2012 URL: http://purl.umn.edu/124225
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Augmented Gravity Model: An Empirical Application to Mercosur-European Union Trade Flows AgEcon
Martinez-Zarzoso, Inmaculada; Nowak-Lehmann, Felicitas.
This paper applies the gravity trade model to assess Mercosur-European Union trade, and trade potential following the agreements reached recently between both trade blocs. The model is tested for a sample of 20 countries, the four formal members of Mercosur plus Chile and the fifteen members of the European Union. A panel data analysis is used to disentangle the time invariant country-specific effects and to capture the relationships between the relevant variables over time. We find that the fixed effect model is to be preferred to the random effects gravity model. Furthermore, a number of variables, namely, infrastructure, income differences and exchange rates added to the standard gravity equation, are found to be important determinants of bilateral...
Tipo: Journal Article Palavras-chave: Gravity equation; Panel data; Infrastructure; Integration; International Relations/Trade; F14; F15.
Ano: 2003 URL: http://purl.umn.edu/43996
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Estimating Farm Efficiency in the Presence of Double Heteroscedasticity Using Panel Data AgEcon
Hadri, Kaddour; Guermat, Cherif; Whittaker, Julie.
The accuracy of technical efficiency measures is important given the interest in such measures in policy discussions. In recent years the use of stochastic frontiers has become popular for estimating technical inefficiency, but estimated inefficiencies are sensitive to specification errors. One source of such errors is heteroscedasticity. This paper addresses this issue by extending the Hadri (1999) correction for heteroscedasticity to stochastic production frontiers and to panel data. It is argued that heteroscedasticity within an estimation can have a significant effect on results, and that correcting for heteroscedasticity yields more accurate measures of technical inefficiency. Using panel data on cereal farms, it is found that the usual technical...
Tipo: Journal Article Palavras-chave: Stochastic frontier production; Heteroscedasticity; Technical efficiency; Panel data; Farm Management; Research Methods/ Statistical Methods; C23; C24; D24; Q12.
Ano: 2003 URL: http://purl.umn.edu/43994
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Analisis Malmquist y DEA intertermporal de las agriculturas de la Union Europea AgEcon
Aldaz, Natalia; Millan, Joaquin A..
En este trabajo se realiza un análisis comparado de dos métodos no paramétricos de medida de productividad total de los factores con datos de panel basados en programación: índices de Malmquist y un modelo DEA intertemporal que permite acotar las medidas de eficiencia y progreso técnico, suponiendo cambio técnico no regresivo. La aplicación se realiza sobre las agriculturas de los países de la Unión Europea, encontrándose algunas diferencias importantes entre ambos enfoques. Los resultados sugieren menor crecimiento de productividad agraria y, sobre todo, una ordenación distinta de países en relación con dichos crecimientos que los encontrados en otros trabajos. Palabras clave: Productividad, DEA, Agricultura, Europa, Datos de panel. SUMMARY This paper...
Tipo: Journal Article Palavras-chave: Productivity; DEA; Agriculture; Europe; Panel data; Agricultural and Food Policy; D24; O47; Q10.
Ano: 2003 URL: http://purl.umn.edu/28796
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Influence of Animal Feeding on Milk Supply in Navarre AgEcon
Casasnovas, Valero L.; Aldanondo, Ana Maria.
Determining the competitive position of dairy farms depends on several technological, economic and institutional variables. Among them, are remarkable those related to animal feeding in the current context of high variability on prices. In this context, the aim of our study is to analyze the effects on milk supply and the competitiveness of dairy farms with different models of land intensification, with greater reliance on market purchases or self production of livestock feed. Our work is based on an econometric approach to a variable cost function, in a fixed effects model for unbalanced panel data of specialized dairy farms in Navarre (Spain). From this region, we use 3 geographical areas in relation to the availability of grazing land. It has been...
Tipo: Conference Paper or Presentation Palavras-chave: Multiproduct cost function; Panel data; Milk; Animal feed; Dairy farms; Livestock Production/Industries.
Ano: 2011 URL: http://purl.umn.edu/114316
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Production Efficiency in Ukrainian Agriculture and the Process of Economic Reform AgEcon
Kurkalova, Lyubov A.; Jensen, Helen H..
A representative sample of 49 state and collective farms in Ukraine provides data in physical units on livestock and crop production and input use for 1989-92. The changes in production efficiency for beef, pork, dairy, winter wheat, grain, and potato production, investigated using stochastic frontier methods, show declining technical efficiency in livestock production and especially low marginal contribution of labor inputs. The number of workers, size of farm, and distance from nearest city are related to efficiency in agricultural production.
Tipo: Working or Discussion Paper Palavras-chave: Technical efficiency; Panel data; Economies in transition; Frontier production function; Productivity Analysis.
Ano: 1996 URL: http://purl.umn.edu/18581
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FARM CHARACTERISTICS THAT INFLUENCE NET FARM INCOME VARIABILITY AND LOSSES AgEcon
Dunn, Jerry W.; Williams, Jeffery R..
Farm-level, cross-section and panel data were used with econometric methods to examine relationships between variability in net farm income and explanatory variables including government payments, gross crop income, gross livestock income, costs, efficiency measures, and other socioeconomic characteristics such as age, leverage, percent of land rented, and enterprise diversification. The results suggest that quantifying the impacts of socioeconomic factors on variability of net farm income is difficult. Among the income variables, changes in gross crop income had the largest impact. Among cross-section data, increases in interest costs, age, and diversification were found to have positive relationships with net income variability. However, only the...
Tipo: Conference Paper or Presentation Palavras-chave: Diversification; Farm planning; Panel data; Risk; Tobit; Agricultural Finance; Farm Management.
Ano: 2000 URL: http://purl.umn.edu/36337
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An Examination of the Relationship Between Subsidies on Production and Technical Efficiency in Agriculture: The Case of Cotton Producers in Greece AgEcon
Emvalomatis, Grigorios; Oude Lansink, Alfons G.J.M.; Stefanou, Spiro E..
Subsidies on production have long been criticized for protecting producers from competition, and thus removing an incentive for efficient use of the resources. This study undertakes the examination of the impact of partially decoupled subsidies on the technical efficiency scores of cotton producers in Greece. The results indicate that compensatory area payments reduce the efficiency scores of the producers by diverting resources from products for which the subsidy is based on the area planted to the production of cotton, for which the aid is related to the volume of output.
Tipo: Conference Paper or Presentation Palavras-chave: Panel data; Stochastic distance function; Subsidies in agriculture; Agricultural Finance; Crop Production/Industries; Production Economics.
Ano: 2008 URL: http://purl.umn.edu/6673
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Productivity convergence in the European regional agricultures. Determinants of its evolution AgEcon
Cuerva Narro, Maria Carmen.
The aim of this study is to analyse the evolution of the European regional agricultural productivity in terms of convergence. The initial hypothesis is that, in spite of the integration process, the agricultural productivity does not converge to the same stationary level. Additionally, we try to identify the decisive factors affecting such productivity growth. Productivity related information comes from Cambridge Econometrics database for a set of 125 EU-15 regions in the period 1985-2004. The methodology used consists in traditional beta convergence regressions. The difficulties with cross-sectional estimations require the use of panel data techniques for a better estimation of the speed of convergence. The main results show that convergence occurs to...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural productivity; Beta convergence; Panel data; Common Agricultural Policy; Agricultural and Food Policy.
Ano: 2009 URL: http://purl.umn.edu/58002
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Heterogeneous Responses to Water Conservation Programs: The Case of Residential Users in Los Angeles AgEcon
Hanemann, W. Michael; Nauges, Celine.
We propose a detailed analysis of heterogeneity in households’ responses to water conservation programs (price increase, voluntary and mandatory conservation) during periods of water shortage. Using a unique dataset covering water consumption of all residential users in Los Angeles (California) during the drought (1988-1992), we show that households generally were responsive to the conservation measures but that the magnitude of households’ responses varies depending on the instrument and on households’ characteristics, in particular the size of their lot. Price elasticity is estimated between –0.29 and –0.47 in the high season (June-October), and between 0 and –0.19 in the low season (November-May). Results suggest that the voluntary conservation program...
Tipo: Working or Discussion Paper Palavras-chave: Water conservation; Residential use; Heterogeneity in behavior; Panel data; Resource /Energy Economics and Policy; C23; D12; Q25.
Ano: 2006 URL: http://purl.umn.edu/7158
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From the help desk: Swamy's random-coefficients model AgEcon
Poi, Brian P..
This article discusses the Swamy (1970) random-coefficients model and presents a command that extends Stata’s xtrchh command by also providing estimates of the panel-specific coefficients.
Tipo: Journal Article Palavras-chave: Panel data; Random-coefficients models; Research Methods/ Statistical Methods.
Ano: 2003 URL: http://purl.umn.edu/116121
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A Panel Data Analysis of the Repayment Capacity of Farmers AgEcon
Durguner, Sena.
Using a balanced panel of 264 unique Illinois farmers from 2000 to 2004, this study identifies the most pertinent factors that explain the repayment capacity of farmers. After correcting for endogeneity bias caused by farmer-specific effects, one year lagged debt-to-asset ratio and soil productivity are both found to be significantly correlated with the coverage ratio at the 5% significance level using random effects. The finding is significant because it can enhance agricultural lenders’ ability to assess creditworthiness, screen borrowers, manage loan loss reserves, and price loans, thereby decreasing lenders’ costs associated with defaulted loans and ultimately reducing the costs borne by the government and taxpayers.
Tipo: Conference Paper or Presentation Palavras-chave: Panel data; Random effects; Coverage ratio; Financial efficiency; Solvency; Liquidity; Repayment capacity; Profitability; Creditworthiness; Agricultural Finance.
Ano: 2007 URL: http://purl.umn.edu/9361
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Does microfinance reduce rural poverty? Evidence based on household panel data from northern Ethiopia AgEcon
Berhane, Guush; Gardebroek, Cornelis.
This paper evaluates the long-term impact of microfinance credit from the intensity of participation in borrowing. We use a four-round panel data set on 351 farm households that had access to microfinance in northern Ethiopia. Over the years 1997-2006, with three-year intervals, households are observed on key poverty indicators: improvements in annual consumption and housing improvements. The relatively long duration in the panel enables to measure household poverty changes between consecutive periods and see the long-run effects of exposure to microfinance from the intensity of participation borrowing. The fixed-effects model is innovatively modeled to account for potential selection biases due to both time-invariant and time-varying unobserved individual...
Tipo: Conference Paper or Presentation Palavras-chave: Microfinance; Treatment effects; Trend model; Panel data; Agricultural Finance; Community/Rural/Urban Development; Food Security and Poverty; International Development.
Ano: 2009 URL: http://purl.umn.edu/51472
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Returns to Scale of Production Function: Pooled, Within and Between Quantile Regression Approach AgEcon
Reimbaeva, Maya; Shaik, Saleem; Mishra, Ashok K..
Tipo: Conference Paper or Presentation Palavras-chave: Production function; Pooled; Between and Within Quantile Regression; Panel data; Production Economics; Research Methods/ Statistical Methods.
Ano: 2010 URL: http://purl.umn.edu/56563
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COMPARISON OF AGRICULTURAL FARM EFFICIENCY IN SLOVAK REGIONS BEFORE AND AFTER EU ACCESSION AgEcon
Sojkova, Z.; Kropkova, Z.; Kovae, S..
This paper presents results of stochastic parametric approach used in estimation of farm technical efficiency. The estimation of output oriented technical efficiency was based on Stochastic Frontier analysis with Cobb-Douglas production function. Model specification for empirical application were employed Battese and Coelli 1995 model specification, where technical inefficiency effects are explicitly expressed as a function of a vector of firm-specific variables and random error and integrated in the stochastic frontier model. Model also included dummy variable which expressed production conditions in which Slovak farms are operating. We divided farms into two groups of production conditions: productive regions (PR) and less favorable area (LFA) regions....
Tipo: Conference Paper or Presentation Palavras-chave: Less favorable area (LFA); Subsidy; Stochastic production frontier; Panel data; Output – oriented technical efficiency; Cobb-Douglas production function; Production Economics; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/6462
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EXCHANGE RATE VOLATILITY AND U.S. POULTRY EXPORTS: EVIDENCE FROM PANEL DATA AgEcon
Yuan, Yan; Awokuse, Titus O..
Very little research exists on the potential impact of exchange rate volatility on agricultural trade. This paper evaluates the effects of exchange rate volatility on U.S. poultry exports using the gravity model on panel data. We find that exchange rate volatility has a negative effect on the U.S. poultry export but only statistically significant for the model in which we use the variance of spot exchange rate as the measurements. Consistent with previous studies, foreign incomes are also a very important determinant of poultry trade.
Tipo: Conference Paper or Presentation Palavras-chave: Exchange rates; Volatility; Agricultural trade; Poultry exports; Panel data; International Relations/Trade.
Ano: 2003 URL: http://purl.umn.edu/22083
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NUTRIENT EFFECTS ON CONSUMER DEMAND: A PANEL DATA APPROACH AgEcon
Dhehibi, Boubaker; Gil, Jose Maria; Angulo, Ana Maria.
The objective of this paper is to analyze the Spanish demand for food taking into account the consumer's concern about the relationship between food diet and health. This concern is forcing food demand analysts to assume that consumer utility is a function of nutrients instead of simply the food products themselves. A CBS demand model has been considered to model the new demand function obtained, which is estimated with a complete panel data set. Ten broad categories, nine nutrients and the most relevant socio-economic variables have been considered. Finally, after an appropriate model selection strategy, expenditure, price and nutrient elasticities, as well as main sociodemographic effects, have been calculated.
Tipo: Conference Paper or Presentation Palavras-chave: Nutrients; Demand for food; CBS; Panel data; Spain.; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2003 URL: http://purl.umn.edu/25881
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DETERMINANTS OF PART-TIME FARMING AND ITS EFFECT ON FARM PRODUCTIVITY AND EFFICIENCY AgEcon
Lien, Gudbrand D.; Kumbhakar, Subal C.; Hardaker, J. Brian.
Little attention has been given in the agricultural economics literature to the impact of off-farm work on farm productivity and efficiency. More knowledge about what determines part-time farming and whether farm productivity and efficiency are affected by part-time farming could help policy makers introduce better targeted rural development policies. This paper aims to fill the above-mentioned gaps by first analysing factors that influence the choice of off-farm work; and then examining how off-farm work influences productivity and technical efficiency at the farm level. An unbalanced panel data set from 1991 to 2005 from Norwegian grain farms is used for this purpose. The results show that the likelihood of off-farm work and the share of time allocated...
Tipo: Conference Paper or Presentation Palavras-chave: Off-farm work; Productivity; Efficiency; Unobserved heterogeneity; Panel data; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/6701
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FARM-LEVEL DATA MODEL FOR AGRICULTURAL POLICY ANALYSIS: A TWO-WAY ECM APPROACH AgEcon
Sckokai, Paolo; Moro, Daniele; Platoni, Silvia.
Econometric models wishing to estimate relevant parameters for agricultural policy analysis are increasingly relying on unbalanced panels of farm-level data. Since in the agricultural economics literature such models have often been estimated through simplified approaches, in this paper we try to verify whether the adoption of more sophisticated panel data techniques may impact the estimation results. For this reason, the policy model by Moro and Sckokai (1999) has been re-estimated using techniques recently developed in the econometric literature. The preliminary results show a strong impact on the estimations. This seems to suggest that the adoption of proper panel-data techniques is likely to be very important in order to obtain reliable estimates of...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural policy; Panel data; Systems of equations; Agricultural and Food Policy; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/6693
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Integrating Routine, Variety Seeking and Compensatory Choice in a Utility Maximizing Framework AgEcon
Adamowicz, Wiktor L.; Swait, Joffre.
Given the large number of choices that consumers make each day it seems likely that they will generally adopt decision strategies that minimize cognitive effort, particularly with low price products such as most items found in a supermarket. One such strategy may be to simply choose what has been chosen in the past, i.e. to fall into a pattern of routine choices or decisions. In contrast, there may be preferences for variety in markets for low price, highly differentiated goods. We develop a conceptual and empirical model of routine choice, and the factors that result in transitions to two strategies other than routine selection, to wit, utility maximizing choice among available alternatives and a variety seeking strategy. The empirical approach we employ...
Tipo: Working or Discussion Paper Palavras-chave: Choice modeling; Routine behavior; Variety‐seeking; Panel data; Consumer/Household Economics; Demand and Price Analysis; Institutional and Behavioral Economics; D12; D03; C25.
Ano: 2010 URL: http://purl.umn.edu/98687
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