Consulta: subjectFacets:"Panel data"
Registros recuperados: 87
Data/hora: 16/06/2024 13:46:42

Ensuring representative economic data: survey data-collection methods in France for implementing the Common Fisheries Policy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Iseghem, Sylvie; Quillerou, Emmanuelle; Brigaudeau, Cecile; Macher, Claire; Guyader, Olivier; Daures, Fabienne.
Since 2001, Ifremer has implemented an economic data collection programme (EDCP) within the Data Collection Framework of the EU. It aims to obtain economic data from a sample of vessels representative of the entire French fishing fleet. This paper presents the strategies used for vessel sampling selection in the French EDCP and its implementation over several consecutive years. The approach is illustrated by the sampling plan for the fleet in the North Sea Channel Atlantic region. We show that the EDCP allows precise economic indicators such as gross revenue or fuel costs to be estimated for the whole fishing fleet, including small vessels (&lt; 10 m), and consequently, it facilitates sound scientific advice regarding the Common Fisheries Policy. The...
Tipo: Text
Palavras-chave: Data collection; Economic indicators; Fishery-dependent information; Panel data; Sampling; Small vessels; Statistical precision.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15419/12958.pdf

HEALTH, BINGE DRINKING, AND LABOR MARKET SUCCESS: A LONGITUDINAL STUDY ON YOUNG PEOPLE
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Keng,   Shao-Hsun; Huffman,   Wallace E.
Health, like schooling, is a form of human capital and can be expected to be positively related to labor productivity and labor supply.  The production of good health and labor productivity, however, sometimes competes with an individual's lifestyle, e.g., binge drinking.  In this study, an individual's health has three dimensions: current health status, binge drinking which is an unhealthy lifestyle, and stature or mature height which is a young adult's health endowment.  This study presents and fits a dynamic model of an individual's demand for health, demand for binge drinking, labor supply, and wage or demand for labor equations to NLSY 1979 cohort panel data of young people.  We find that binge drinking has a negative but insignificant effect on the...
Tipo: Working or Discussion Paper
Palavras-chave: Health; Labor productivity; Labor supply; Binge drinking; Youth; Panel data; Rational addiction; Human capital; Health Economics and Policy; Labor and Human Capital.
Ano: 1999
URL: http://purl.umn.edu/18252

Sequence analysis with Stata
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Brzinsky-Fay,   Christian; Kohler,   Ulrich; Luniak,   Magdalena.
We describe a general strategy to analyze sequence data and introduce SQ-Ados, a bundle of Stata programs implementing the proposed strategy. The programs include several tools for describing and visualizing sequences as well as a Mata library to perform optimal matching using the Needleman–Wunsch algorithm. With these programs Stata becomes the first statistical package to offer a complete set of tools for sequence analysis.
Tipo: Journal Article
Palavras-chave: Sqclusterdat; Sqclustermat; Sqdes; Sqindexplot; Sqom; Sqparcoord; Sqset; Sqstatlist; Sqstatsum; Sqstattab1; Sqstattab2; Sqstattabsum; Sqtab; Sequence analysis; Optimal matching; Cluster analysis; Panel data; Longitudinal data; Explorative data analysis; Sequence index plot; Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/118169

Panel Data Estimation Methods on Supply and Demand Elasticities: The Case of Cotton in Greece
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Kotakou,   Christina A.
This article examines the effects of the application of panel data estimation methods on a system of equations with unbalanced panel data. We apply pooled, random-effects, and fixed-effects estimation in three data sets: small, medium, and large farms to examine the relationship between farm size and the elasticity of cotton supply with respect to cotton price.  Our results indicate that the adoption of various estimation methods entails different estimated parameters both in terms of their absolute value and in terms of their statistical significance. Additionally, the elasticity of cotton supply with respect to price varies according to farm size.
Tipo: Journal Article
Palavras-chave: Farm size; Panel data; Supply elasticity; Systems of equations; Demand and Price Analysis; C33; D21; Q18.
Ano: 2011
URL: http://purl.umn.edu/100637

Relationship between Trade Liberalisation, Growth and Balance of Payments in Developing Countries: An Econometric Study
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Parikh,   Ashok.
The objectives of this paper are to study the impact of liberalisation on trade deficits and current accounts of developing countries. It is expected that trade liberalisation would promote economic growth from the supply side by leading to a more efficient use of resources, by encouraging competition, and by increasing the flow of ideas and knowledge across national boundaries. Trade liberalisation could lead to faster import growth than export growth and hence the supply side benefits may be offset by the unsustainable balance of payments position. This study uses panel data of 42 countries (both time-series and cross-section dimension) to estimate the effect of trade liberalisation and growth on trade balance while controlling for other factors such as...
Tipo: Working or Discussion Paper
Palavras-chave: Panel data; Income Terms of Trade; Dynamic Optimisation; Dynamic panel model; International Relations/Trade; C21; C22; C23; F13; F14; F32.
Ano: 2004
URL: http://purl.umn.edu/26212

Speaking Stata: Graphing agreement and disagreement
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Cox,   Nicholas J.
Many statistical problems involve comparison and, in particular, the assessment of agreement or disagreement between data measured on identical scales. Some commonly used plots are often ineffective in assessing the fine structure of such data, especially scatterplots of highly correlated variables and plots of values measured “before” and “after” using tilted line segments. Valuable alternatives are available using horizontal reference patterns, changes plotted as parallel lines, and parallel coordinates plots. The quantities of interest (usually differences on some scale) should be shown as directly as possible, and the responses of given individuals should be identified as easily as possible.
Tipo: Journal Article
Palavras-chave: Graphics; Comparison; Agreement; Paired data; Panel data; Scatterplot; Difference-mean plot; Bland–Altman plot; Parallel lines plot; Parallel coordinates plot; Pairplot; Parplot; Linkplot; Tukey; Research Methods/ Statistical Methods.
Ano: 2004
URL: http://purl.umn.edu/116252

Modeling the Household Purchasing Process Using a Panel Data Tobit Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Dong,   Diansheng; Schmit,   Todd M.; Kaiser,   Harry M.
A panel data Tobit model is developed to examine the household purchase process for a frequently purchased commodity. The proposed model accounts not only for censoring or sample selectivity, but also the temporal dependence of the purchasing process using household panel data. The flexible error structure in the model accounts for both state dependence and household heterogeneity. Empirical findings show that purchase habits of milk persist across households over time, and most of them come from the household heterogeneity in preferences. Results also show that advertising increases the purchase quantity and purchase frequency simultaneously.
Tipo: Technical Report
Palavras-chave: Household purchase; Fluid milk; Advertising; Panel data; Tobit model; Probability simulation; Food Consumption/Nutrition/Food Safety.
Ano: 2003
URL: http://purl.umn.edu/122115

Causes of Diversification in Agriculture Over Time: Evidence From Norwegian Farming Sector
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Culas,   Richard J.; Mahendrarajah,   Mahen.
Farm planning generally focuses on optimal diversification with respect to risk and uncertainties, where the risk-management strategies combine production, marketing, financial and environmental responses of the production of farm firm. In this study an empirical examination of farm diversification has been carried out from a sample of farms in Eastern Norway in which four measures of diversification (indices) were defined to incorporate the risk and uncertainties in relation to farm production (total) income. Using these four alternative measures of diversification and panel-data techniques, it has been shown that larger farms are more diversified, and when there is productive location and access to labour the farmers have a greater incentive to spread...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm diversification; Risk and uncertainty; Environmental management; Panel data; Agribusiness; C23; Q12; Q20.
Ano: 2005
URL: http://purl.umn.edu/24647

Credit Accessibility, Risk Attitude, and Social Learning: Investment Decisions of Aquaculture in Rural Indonesia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Miyata,   Sachiko; Sawada,   Yasuyuki.
This study examines the factors that influenced poor Indonesian farmers to invest in floating net aquaculture after being relocated due to a reservoir construction project. To compare three primary decision factors, credit accessibility, risk attitudes, and social learning, (i.e., learning effects from others’ experience), we analyze 16 years of socio-economic retrospective data collected in the field interviews exclusively for this study. Our analysis reveals that credit accessibility and risk attitudes are the most important factors that influence the rate of aquaculture investment. Social learning as well as household education also influences the investment decision significantly. Our results suggest that developmen t projects that involve voluntary...
Tipo: Conference Paper or Presentation
Palavras-chave: Household investment decision; Credit constraints; Risk attitudes; Social learning; Panel data; Farm Management; D1; D8; D12; Q22.
Ano: 2006
URL: http://purl.umn.edu/25669

The Determinants of Agglomeration in Health Care Sector Employment in US Metropolitan areas
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mishra,   Bhawani P.
Paper Presented on 41st Annual and Conference Mid-Continent Regional Science Association (MCRSA), June 3-5, 2010 St. Louis, MO
Tipo: Conference Paper or Presentation
Palavras-chave: Agglomeration; Panel data; Metropolitan area; Community/Rural/Urban Development.
Ano: 2010
URL: http://purl.umn.edu/93896

Market Integration in the North American Onion Markets: An Empirical Analysis Using Panel Data
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Susanto,   Dwi; Rosson,   C. Parr, III; Adcock,   Flynn J.
This study investigates the level of market integration in the North American Onion Markets. A two-sample period analysis shows an increase in the speed of price convergence overtime, suggesting deeper market integration as NAFTA was fully implemented. Further analysis showed that U.S.-Canadian markets have experienced deeper market integration compared with U.S.-Mexican markets as well as Canadian-Mexican markets.
Tipo: Conference Paper or Presentation
Palavras-chave: Market integration; Onion markets; Panel data; Price convergence; Marketing.
Ano: 2007
URL: http://purl.umn.edu/34897

The Trade Effects of MERCOSUR and The Andean Community on U.S. Cotton Exports to CBI countries
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Yeboah,   Osei-Agyeman; Shaik,   Saleem; Batson,   Seon.
The United States engagement in nonreciprocal preferential trade arrangements has been proliferating with several developing countries throughout the past couple of decades. One of the oldest and more successful of these arrangements has been the Caribbean Basin Initiative (CBI).The CBI is a general term used to refer to the Caribbean Basin Economic Recovery Act of 1983 (CBERA), the Caribbean Basin Economic Recovery Expansion Act of 1990 (CBERA Expansion Act), and the Caribbean Basin Trade Partnership of 2000 (CBTPA) (Ozden and Sharma 2006). The central premise behind the plan was that, by encouraging the CBI countries to become more open and liberal, trade would expand – and eventually translate into economic development and growth (Deere, 1990). The...
Tipo: Conference Paper or Presentation
Palavras-chave: Panel data; Trade diversion; Trade creation; CBI; Cotton imports; Agricultural and Food Policy; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/46028

Do Fertilizer Subsidies Affect the Demand for Commercial Fertilizer? An Example from Malawi
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

The empirics of the Solow Growth Model: Long-term evidence.
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Barossi-Filho,   Milton; Goncalves Silva,   Ricardo; Diniz,   Eliezer Martins.
In this paper we reassess the standard Solow growth model, using a dynamic panel data approach. A new methodology is chosen to deal with this problem. First, unit root tests for individual country time series were run. Second, panel data unit root and cointegration tests were performed. Finally, the panel cointegration dynamics is estimated by (DOLS) method. The resulting evidence supports roughly one-third capital share in income, a.
Tipo: Journal Article
Palavras-chave: Economic growth; Panel data; Unit root; Cointegration and convergence; O47; O50; O57; C33; And C52.
Ano: 2005
URL: http://purl.umn.edu/37227

The Contribution of Foreign Direct Investment to China's Export Performance: Evidence from Disaggregated Sectors
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Gu,   Weishi; Awokuse,   Titus O.; Yuan,   Yan.
There has been a long debate in the theoretical and empirical economic circles on how host country's exports respond to inward foreign direct investment (FDI). This paper examines whether FDI stimulates export performance of the recipient countries using the case of China. It contributes to the literature by investigating the relationship of FDI and export performance using disaggregated manufacturing sectors from 1995 to 2005. The empirical results suggest that FDI flows into China have statistically significant and positive effects on its exports and it exhibits differences across sectors.
Tipo: Conference Paper or Presentation
Palavras-chave: Export performance; Foreign direct investment; China; Panel data; International Relations/Trade; F21; F14; C33.
Ano: 2008
URL: http://purl.umn.edu/6453

What are the Enduring Effects of Fertilizer Subsidy Programs on Recipient Farm Households? Evidence from Malawi
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ricker-Gilbert,   Jacob; Jayne,   Thomas S.
Replaced with revised version of paper 08/23/11.
Tipo: Working or Discussion Paper
Palavras-chave: Fertilizer subsidies; Malawi; Sub-Saharan Africa; Endogeneity; Panel data; International Development; Political Economy; C23; C26; Q12; Q13; Q18.
Ano: 2011
URL: http://purl.umn.edu/109593

Trade Creation and Trade Diversion in the North American Free Trade Agreement: The Case of the Agricultural Sector
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Susanto,   Dwi; Rosson,   C. Parr, III; Adcock,   Flynn J.
This paper examines the effect of the U.S.-Mexico trade agreement under the North American Free Trade Agreement (NAFTA). The results suggest that U.S. agricultural imports from Mexico have been responsive to tariff rate reductions applied to Mexican products. A one percentage point decrease in tariff rates is associated with an increase in U.S. agricultural imports from Mexico by 5.31% in the first 6 years of NAFTA and by 2.62% in the last 6 years of NAFTA. U.S. imports from Mexico have also been attributable to the pre-NAFTA tariff rates. Overall, the results indicate that the U.S.-Mexico trade agreement under NAFTA has been trade creating rather than trade diverting.
Tipo: Journal Article
Palavras-chave: Agricultural sector; NAFTA; Panel data; Tariffs; Trade creation; Trade diversion; International Relations/Trade; F10; F15; Q17; Q18; C31; C33.
Ano: 2007
URL: http://purl.umn.edu/6618

The Effect of Retail Grocery Coupons for Breakfast Cereals on Household Purchasing Behavior
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Berning,   Joshua P.; Zheng,   Hualu.
We examine the affect of retail and manufacturer coupons on the nutritional quality of breakfast cereal purchases made by households. Using household level purchase data we find that coupon usage has a significant impact on the nutritional quality of cereals purchased by households. Specifically, we find that the average sugar content decreases and the fiber content increases. This suggests that coupons have a positive impact on the nutritional quality of cereals purchased by households, holding all other factors constant.   Given the prolific use of coupons by households and the fact that they offer both a price discount and an advertisement for products, they might be an effective way to help guide consumers to healthier food choices.
Tipo: Conference Paper or Presentation
Palavras-chave: Coupons; Breakfast cereal; Nutrition; Panel data; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; Marketing; D10; I10; M30; C23.
Ano: 2011
URL: http://purl.umn.edu/103661

Estimating an Ex Ante Cost Function for Belgian Arable Crop Farms
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Hansen,   Kristiana; Baudry,   Alexandre; De Blander,   Rembert; Frahan,   Bruno Henry de; Polome,   Philippe.
We estimate a farm-level cost function for Belgian crop farms using FADN data over the study period 1996-2006. We rely on an estimation of farmers' expected yields at the time cropping decisions are made rather than actual yields observed in the FADN data. The use of an ex ante cost function improves the cost function estimation. We subsequently suggest how our cost function can be used in simulations to analyze farmer response to changes in output price risk.
Tipo: Conference Paper or Presentation
Palavras-chave: Cost function estimation; Panel data; Risk; Agricultural and Food Policy; Crop Production/Industries; Production Economics; Q12; Q18.
Ano: 2009
URL: http://purl.umn.edu/49477

Analysis of Farm Development in Dutch Agriculture and Horticulture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Bremmer,   Johan; Oude Lansink,   Alfons G.J.M.; Olson,   Kent D.; Baltussen,   Willy H.M.; Huirne,   Ruud B.M.
This paper analysis the effects of farmer characteristics, farm structure and farm performance on farm renewal and farm growth. The data set used in this research consists  of panel data from the Dutch Farm Accountancy Data Network of farms specialized in plant production extended with a data from survey among those farms. Probit models were used to determine the likelihood of the changes. Results show that the degree of mechanization increases the probability of farm growth and farm renewal. Family labour  input and solvency have a negative impact on farm growth. Farm size is positively correlated with farm renewal. No indications of the influence of the life cycle have been  found.
Tipo: Conference Paper or Presentation
Palavras-chave: Decision making; Diversification; Farm growth; Farm structure; Innovation; Panel data; Crop Production/Industries; Farm Management.
Ano: 2002
URL: http://purl.umn.edu/7025

Impact of a Commodity Price Spike on Poverty Dynamics: Evidence from a Panel of Rural Households in Bangladesh
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Augmented Gravity Model: An Empirical Application to Mercosur-European Union Trade Flows
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Estimating Farm Efficiency in the Presence of Double Heteroscedasticity Using Panel Data
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Analisis Malmquist y DEA intertermporal de las agriculturas de la Union Europea
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Influence of Animal Feeding on Milk Supply in Navarre
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Production Efficiency in Ukrainian Agriculture and the Process of Economic Reform
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

FARM CHARACTERISTICS THAT INFLUENCE NET FARM INCOME VARIABILITY AND LOSSES
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

An Examination of the Relationship Between Subsidies on Production and Technical Efficiency in Agriculture: The Case of Cotton Producers in Greece
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Productivity convergence in the European regional agricultures. Determinants of its evolution
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Heterogeneous Responses to Water Conservation Programs: The Case of Residential Users in Los Angeles
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

From the help desk: Swamy's random-coefficients model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

A Panel Data Analysis of the Repayment Capacity of Farmers
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Does microfinance reduce rural poverty? Evidence based on household panel data from northern Ethiopia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Returns to Scale of Production Function: Pooled, Within and Between Quantile Regression Approach
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

COMPARISON OF AGRICULTURAL FARM EFFICIENCY IN SLOVAK REGIONS BEFORE AND AFTER EU ACCESSION
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

EXCHANGE RATE VOLATILITY AND U.S. POULTRY EXPORTS: EVIDENCE FROM PANEL DATA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

NUTRIENT EFFECTS ON CONSUMER DEMAND: A PANEL DATA APPROACH
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

DETERMINANTS OF PART-TIME FARMING AND ITS EFFECT ON FARM PRODUCTIVITY AND EFFICIENCY
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

FARM-LEVEL DATA MODEL FOR AGRICULTURAL POLICY ANALYSIS: A TWO-WAY ECM APPROACH
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Integrating Routine, Variety Seeking and Compensatory Choice in a Utility Maximizing Framework
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Impact of global warming on Chinese wheat productivity
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: You,   Liangzhi; Rosegrant,   Mark W.; Fang,   Cheng; Wood,   Stanley.
Climate change continues to have major impact on crop productivity all over the world. While many researchers have evaluated the possible impact of global warming on crop yields using mainly indirect crop simulation models, there are relatively few direct assessments on the impact of observed climate change on past crop yield and growth. We use a 1979-2000 Chinese crop-specific panel dataset to investigate the climate impact on Chinese wheat yield growth. We find that a 1 percent increase in wheat growing season temperature reduces wheat yields by about 0.3 percent. This negative impact is less severe than those reported in other regions. Rising temperature over the past two decades accounts for a 2.4 percent decline in wheat yields in China while the...
Tipo: Working or Discussion Paper
Palavras-chave: Global warming; Wheat yield; Production function; Marginal impact; Panel data; Climate; Wheat production; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/58588

The Interaction between Alcohol and Cigarette Consumption
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Koksal,   Aycan; Wohlgenant,   Michael K.
It has long been recognized that cigarette and alcohol not only have adverse health effects, but also negative externalities imposed on third parties. If cigarette and alcohol are related in consumption, the information on the way in which they are related may allow a better coordination of the public policies concerning these goods. In this study, we use the expenditure data of a panel of US households to analyze the relation between cigarette and alcohol consumption in a rational addiction framework. We believe that individual level data would be a better tool to analyze addictive behavior as aggregate data might conceal much of micro behavior. We found that cigarettes and alcoholic beverages are substitutes. However, both cigarette and alcohol demand do...
Tipo: Conference Paper or Presentation
Palavras-chave: Rational addiction; Panel data; Cigarette consumption; Alcohol consumption; Demand and Price Analysis.
Ano: 2010
URL: http://purl.umn.edu/61305

THE IMPACT OF MANURE PRODUCTION RIGHTS ON CAPITAL INVESTMENT IN THE DUTCH PIG SECTOR
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Gardebroek,   Cornelis.
In this paper the effect of manure production rights on investment decisions of Dutch pig farmers is examined. A dynamic optimization model of investment that explicitly takes zero investments into account is augmented by a  constraint on production arising from the introduction of manure production rights. In the theoretical model it is shown that such a constraint has a reducing effect on investment. The presence of this constraint is tested for  using GMM structural break tests. The results provide evidence for the hypothesis that manure production rights have reduced investments through its effect on production.
Tipo: Conference Paper or Presentation
Palavras-chave: Investment; Manure production rights; Euler equation; GMM; Structural break testing; Panel data; Pig farms; Livestock Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/20490

What is it Consumers really want, and how can their preferences be influenced? The Case of fat in Milk
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Andersen,   Laura M.; Smed,   Sinne.
In this paper we investigate preferences for fat in milk through a structural characteristics model. The data includes information about daily purchases and social and demographic characteristics of more than 1,100 households. We find that consumers who prefer milk with a high fat content do not react to information about health effects, but can be influenced by prices, while consumers who prefer milk with a low share of fat are influenced by information, but are less price sensitive. Therefore, when attempting to decrease consumption of fat from milk, prices are more efficient than information.
Tipo: Presentation
Palavras-chave: Fat in milk; Characteristics model; Hedonic prices; Information; Panel data; Food Consumption/Nutrition/Food Safety; D12.
Ano: 2012
URL: http://purl.umn.edu/122728

Industrial Coal Demand in China: A Provincial Analysis
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Cattaneo,   Cristina; Manera,   Matteo; Scarpa,   Elisa.
In recent years, concerns regarding the environmental implications of the rising coal demand have induced considerable efforts to generate long-term forecasts of China’s energy requirements. Nevertheless, none of the previous empirical studies on energy demand for China has tackled the issue of modelling coal demand in China at provincial level. The aim of this paper is to fill this gap. In particular, we model and forecast the Chinese demand for coal using time series data disaggregated by provinces. Moreover, not only does our analysis account for heterogeneity among provinces, but also, given the nature of the data, it captures the presence of spatial autocorrelation among provinces using a spatial econometric model. A fixed effects spatial lag model...
Tipo: Working or Discussion Paper
Palavras-chave: Energy demand; Coal demand; China; Spatial econometrics; Panel data; Forecasting; Resource /Energy Economics and Policy; C23; E6; Q31; Q41.
Ano: 2008
URL: http://purl.umn.edu/44425

Discussion: Applications and Innovations in Spatial Econometrics
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: LeSage,   James P.
These articles provide a discussion of studies presented in a session on spatial econometrics, focusing on the ability of spatial regression models to quantify the magnitude of spatial spillover impacts. Both articles presented argue that a proper modeling of spatial spillovers is required to truly understand the phenomena under study, in one case the impact of climate change on land values (or crop yields) and in the second the role of regional industry composition on regional business establishment growth.
Tipo: Journal Article
Palavras-chave: Lagged variables; Panel data; Spatial spillovers; Community/Rural/Urban Development; Environmental Economics and Policy; Resource /Energy Economics and Policy; C33; C51.
Ano: 2011
URL: http://purl.umn.edu/113519

The Impact of Weather Extremes on Agricultural Production Methods: Does Drought Increase Adoption of Conservation Tillage Practices?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ding,   Ya; Schoengold,   Karina; Tadesse,   Tsegaye.
The paper combines panel data techniques with spatial analysis to measure the impact of extreme weather events on the adoption of conservation tillage. Zellner’s SUR technique is extended to spatial panel data to correct for cross-sectional heterogeneity, spatial autocorrelation, and contemporaneous correlation. Panel data allow the identification of differences in adoption rates. The adoption of no-till, other conservation tillage, and reduced-till are estimated relative to conventional tillage. Extremely dry conditions in recent years increase the adoption of other conservation tillage practices, while spring floods in the year of production reduce the use of no-till practices.
Tipo: Journal Article
Palavras-chave: Conservation tillage; Drought; Panel data; Technology adoption; Weather extremes; Crop Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/57631

Do Private Labels Generate Loyalty? Empirical Evidence for German Frozen Pizza
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Wettstein,   Nadine; Brosig,   Stephan; Glauben,   Thomas; Hanf,   Jon Henrich; Loy,   Jens-Peter.
www.ifama.org
Tipo: Journal Article
Palavras-chave: Food retailing; Private labels; Brand loyalty; Panel data; Hazard analysis; Consumer/Household Economics; Demand and Price Analysis; Institutional and Behavioral Economics; Marketing.
Ano: 2009
URL: http://purl.umn.edu/92572

Effect of infrastructure investments on total factor productivity (TFP) in Brazilian agriculture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mendes,   Sergio Magno; Teixeira,   Erly Cardoso; Salvato,   Marcio Antonio.
Since the 1980s, the investments in infrastructure have been significantly reduced, jeopardizing Total Factor Productivity (TFP) and competitiveness of Brazilian agriculture. The Solow growth model with panel data is used to estimate TFP. An adaptation of the Zhang and Fan (2004) model for India, using the Generalized Method of Moments (GMM), is applied to study the effects of infrastructure investments on TFP. The lack of such investments in Brazil caused the effects to be larger and with lag periods smaller than in other countries. These investments affect TFP in the first years, and the study suggests that the return occurs in the period from zero to two years. Among the analyzed infrastructure elements, investments in roads have the greatest impact on...
Tipo: Conference Paper or Presentation
Palavras-chave: Infrastructure investments; TFP; Agriculture; Panel data; GMM; International Development; Productivity Analysis.
Ano: 2009
URL: http://purl.umn.edu/50777

PANEL STRATIFICATION IN META-ANALYSIS OF ECONOMIC STUDIES: AN INVESTIGATION OF ITS EFFECTS IN THE RECREATION VALUATION LITERATURE
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Rosenberger,   Randall S.; Loomis,   John B.
Statistical summarizations of literature review databases using meta-regression analysis provide insight into the differences in past estimates of economic variables such as benefits and price elasticities.  The panel nature of the data is an issue that has not received adequate attention in past meta-analyses.  This paper conceptually and empirically explores the complexity of stratifying data into panels that model the potential correlation and heterogeneity of past outdoor recreation benefit research. Although our tests of three stratifications of the data did not discern panel effects, the inherent complexity of the data maintains a strong presumption of heterogeneous strata.
Tipo: Journal Article
Palavras-chave: Meta-analysis; Outdoor recreation economic benefits; Panel data; Stratification; Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/15310

Econometric Analysis of the Effects of Subsidies on Farm Production in Case of Endogenous Input Quantities
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: 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

Testing for serial correlation in linear panel-data models
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Drukker,   David M.
Because serial correlation in linear panel-data models biases the standard errors and causes the results to be less efficient, researchers need to identify serial correlation in the idiosyncratic error term in a panel-data model. A new test for serial correlation in random- or fixed-effects one-way models derived by Wooldridge (2002) is attractive because it can be applied under general conditions and is easy to implement. This paper presents simulation evidence that the new Wooldridge test has good size and power properties in reasonably sized samples.
Tipo: Journal Article
Palavras-chave: Panel data; Serial correlation; Specification tests; Research Methods/ Statistical Methods.
Ano: 2003
URL: http://purl.umn.edu/116069

Combating chronic poverty in Uganda: towards a new strategy
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ssewanyana,   Sarah N.
Using a panel of 3,572 households in the Northern Uganda Social Action Fund (NUSAF) region interviewed in 2004 and in 2008, the paper provides new evidence on chronic poverty in Uganda. While progress in reducing poverty rates has been impressive from 64.6 percent to 52.2 percent, the levels remain high with a significant number of persistently poor households. Four in every ten households are chronically poor of which 44.9 percent are living in extreme chronic poverty. About 37.8 percent of the households are living in transient poverty of which 67.4 percent escaped poverty during the panel period. The substantial movements out of poverty can perhaps be explained largely by the relative return of peace in the region that enabled households to engage in...
Tipo: Report
Palavras-chave: Chronic poverty; Poverty dynamics; Panel data; Uganda; Northern Uganda; EPRC; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/101713

Precio de la tierra con presión urbana: un modelo para España
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Decimavilla,   Esther; San Juan,   Carlos; Sperlich,   Stefan.
RESUMEN: Estudiamos el precio de la tierra para uso agrario y las variables que determinan su evolución en España, tratando de identificar qué parte de la subida de precios observada se justifica por elementos «internos», relacionados con la renta agraria esperada, y cuál proviene de elementos externos o especulativos, vinculados a cambios en el uso del suelo. Además se relaciona el ciclo de precios con la aceleración de la especialización en el ámbito regional y la integración en la PAC. La novedad de este trabajo consiste en identificar, mediante técnicas de datos de panel, factores no fundamentales (presión urbanizadora, creación de regadíos, cambio demográfico) que, además de los fundamentales (ingresos esperados y localización geográfica) determinan...
Tipo: Journal Article
Palavras-chave: Especialización regional; Especulación urbana; Datos de panel; Precios de la tierra; Productividad agraria; Urban pressure; Panel data; Land prices; Agricultural productivity; Regional specialization; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Land Economics/Use; Research Methods/ Statistical Methods; Q15; R14; Q24; R52.
Ano: 2008
URL: http://purl.umn.edu/37186

Estimation and testing of fixed-effect panel-data systems
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Blackwell,   J. Lloyd, III.
This paper describes how to specify, estimate, and test multiple-equation, fixed-effect, panel-data equations in Stata. By specifying the system of equations as seemingly unrelated regressions, Stata panel-data procedures worked seamlessly for estimation and testing of individual variable coefficients, but additional routines using test were needed for testing of individual equations and differences between equations.
Tipo: Journal Article
Palavras-chave: Panel data; Fixed effect; Multiple equations; Seemingly unrelated regressions; Heteroskedasticity; Autocorrelation; Contemporaneous correlation; Tests of linear combinations; Research Methods/ Statistical Methods.
Ano: 2005
URL: http://purl.umn.edu/117512

Panel Data Estimation Techniques for Farm-level Data Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Platoni,   Silvia; Sckokai,   Paolo; Moro,   Daniele.
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 reestimated 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.
Ano: 2008
URL: http://purl.umn.edu/44268

PANEL DATA DOUBLE-HURDLE MODEL: AN APPLICATION TO DAIRY ADVERTISING
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Dong,   Diansheng; Chung,   Chanjin; Kaiser,   Harry M.
In this study, we extend to panel data structures the double-hurdle model typically used in cross-sectional data.  The new double-hurdle model can account not only for the censored nature of commodity purchases, but also for the dynamics of the purchase process.  In this model, a flexible error structure is assumed to account for state dependence and household-specific heterogeneity.  In the empirical application for milk purchase, we find that generic advertising increases the probability of market participation as well as the purchase quantity and incidence.  Temporal dependence is also found in both purchase and participation equations.
Tipo: Conference Paper or Presentation
Palavras-chave: Double-hurdle model; Panel data; Household purchase; Milk; Advertising; Heterogeneity; State dependence; Simulated maximum likelihood; Marketing.
Ano: 2001
URL: http://purl.umn.edu/20502

Reliable estimation of generalized linear mixed models using adaptive quadrature
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Rabe-Hesketh,   Sophia; Skrondal,   Anders; Pickles,   Andrew.
Generalized linear mixed models or multilevel regression models have become increasingly popular. Several methods have been proposed for estimating such models. However, to date there is no single method that can be assumed to work well in all circumstances in terms of both parameter recovery and computational efficiency. Stata’s xt commands for two-level generalized linear mixed models (e.g., xtlogit) employ Gauss–Hermite quadrature to evaluate and maximize the marginal log likelihood. The method generally works very well, and often better than common contenders such as MQL and PQL, but there are cases where quadrature performs poorly. Adaptive quadrature has been suggested to overcome these problems in the two-level case. We have recently implemented a...
Tipo: Journal Article
Palavras-chave: Adaptive quadrature; Gllamm; Generalized linear mixed models; Random-effects models; Panel data; Numerical integration; Adaptive integration; Multilevel models; Clustered data; Research Methods/ Statistical Methods.
Ano: 2002
URL: http://purl.umn.edu/115947

Effect of infrastructure investments on total factor productivity (TFP) in Brazilian agriculture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mendes,   Sergio Magno; Teixeira,   Erly Cardoso; Salvato,   Marcio Antonio.
Since the 1980s, the investments in infrastructure have been significantly reduced, jeopardizing Total Factor Productivity (TFP) and competitiveness of Brazilian agriculture. The Solow growth model with panel data is used to estimate TFP. An adaptation of the Zhang and Fan (2004) model for India, using the Generalized Method of Moments (GMM), is applied to study the effects of infrastructure investments on TFP. The lack of such investments in Brazil caused the effects to be larger and with lag periods smaller than in other countries. These investments affect TFP in the first years, and the study suggests that the return occurs in the period from zero to two years. Among the analyzed infrastructure elements, investments in roads have the greatest impact on...
Tipo: Working or Discussion Paper
Palavras-chave: Infrastructure investments; TFP; Agriculture; Panel data; GMM; Agricultural and Food Policy; Public Economics.
Ano: 2008
URL: http://purl.umn.edu/53441

Combining mixed logit models and random effects models to identify the determinants of willingness to pay for rural landscape improvements
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Campbell,   Danny.
This paper reports the findings from a discrete choice experiment study designed to estimate the economic benefits associated with rural landscape improvements in Ireland. Using a mixed logit model, the panel nature of the dataset is exploited to retrieve willingness to pay values for every individual in the sample. This departs from customary approaches in which the willingness to pay estimates are normally expressed as measures of central tendency of an a priori distribution. In a different vein from analysis conducted in previous discrete choice experiment studies, this paper uses random effects models for panel data to identify the determinants of the individual-specific willingness to pay estimates. In comparison with the standard methods used to...
Tipo: Conference Paper or Presentation
Palavras-chave: Agri-environment; Discrete choice experiments; Mixed logit; Panel data; Random effects; Willingness to pay; Demand and Price Analysis; Environmental Economics and Policy; C33; C35; Q24; Q51.
Ano: 2007
URL: http://purl.umn.edu/7975

Using panel data to estimate the effect of rainfall shocks on smallholders food security and vulnerability in rural Ethiopia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Demeke,   Abera Birhanu; Zeller,   Manfred.
Ethiopia's agriculture is predominantly rainfed and hence any irregularity in weather conditions has adverse welfare implications. Using panel data, this paper analyzes the effect of rainfall shocks on Ethiopian rural households' food security and vulnerability over time while controlling for a range of other factors. To this end, we generated a time-variant household food security index which is developed by principal components analysis. Based on the scores of the index, households were classified into relative food security groups and their socioeconomic differences were assessed. The exploratory results show that compared to the less secured households, the more secured ones have male and literate household heads, tend to have a greater number of...
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Principal components analysis; Rainfall; Panel data; Ethiopia; Food Security and Poverty; Research Methods/ Statistical Methods; Q18; C13.
Ano: 2009
URL: http://purl.umn.edu/57994

Multi-output Technical Efficiency for Argentinean Dairy Farms Using Stochastic Production and Stochastic Distance Frontiers with Unbalanced Panel Data
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Moreira Lopez,   Victor H.; Bravo-Ureta,   Boris E.; Arzubi,   Amilcar; Schilder,   Ernesto.
Published by Asociación de Economistas Agrarios de Chile
Tipo: Journal Article
Palavras-chave: Argentina; Dairy farms; Panel data; Stochastic production and stochastic distance frontiers; Technical efficiency; Production Economics; Productivity Analysis.
Ano: 2006
URL: http://purl.umn.edu/97360

Do private labels generate customer loyalty in food retailing?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Wettstein,   Nadine; Brosig,   Stephan; Glauben,   Thomas; Hanf,   Jon Henrich; Loy,   Jens-Peter.
The increase of private labels in food retailing and retailers' high expenditures for establishing them raise one central question: Do consumers really consider private labels as "real" brands and develop loyalty towards them. We analyse a four year panel data set on frozen pizza purchases to study differences in consumers' repurchasing behaviour between two strong national brands and private labels. In sum, our results show significant differences. However, the observable repurchase behaviour can not fully reflect the attitudinal component of brand loyalty. So subsequently, we present potential approaches to identify the underlying attitudinal component.
Tipo: Conference Paper or Presentation
Palavras-chave: Food retailing; Private labels; Brand loyalty; Panel data; Hazard analysis; Consumer/Household Economics; Marketing.
Ano: 2009
URL: http://purl.umn.edu/53265

Food Safety Regulation and Firm Productivity: Evidence from the French Food Industry
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Requillart,   Vincent; Nauges,   Celine; Simioni,   Michel; Bontemps,   Christophe.
The purpose of this article is to assess whether food safety regulations imposed by the European Union in the 2000s may have induced a slow-down in the productivity of firms in the food processing sector. The impact of regulations on costs and productivity has seldom been studied. This article contributes to the literature by measuring productivity change using a panel of French food processing firms for the years 1996 to 2006. To do so, we develop an original iterative testing procedure based on the comparison of the distribution of efficiency scores of a set of firms. Our results confirm that productivity decreased in the poultry processing industry at the time when safety regulation was reinforced.
Tipo: Presentation
Palavras-chave: Total factor productivity; Safety regulation; Food processing sector; Panel data; Non-parametrics; Food Consumption/Nutrition/Food Safety; C14; D24; L66.
Ano: 2012
URL: http://purl.umn.edu/124378

Production Risk and Technical Inefficiency in Russian Agriculture
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Bokusheva,   Raushan; Hockmann,   Heinrich.
This paper aims to contribute to a better understanding of possible causes of considerable production variability that characterised Russian agriculture during the last decade. The study investigates production risk and technical inefficiency as two sources that influence production variability. Using panel data from 1996 to 2001, an empirical analysis of 443 large agricultural enterprises from three regions in central, southern and Volga Russia is conducted. A production function specification accounting for the effect of inputs on both risk and technical inefficiency is found to describe production technologies of Russian farms more appropriately than the traditional stochastic frontier formulation.
Tipo: Conference Paper or Presentation
Palavras-chave: Production risk; Technical efficiency; Panel data; Russian agriculture; Production Economics; D81; Q12.
Ano: 2005
URL: http://purl.umn.edu/24610

Structural Regional Factors that Determine Absolute and Relative Accuracy of U.S. Regional Labor Market Forecasts
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: West,   Carol Taylor.
Panel data on regional employment forecasts from structural equation econometric models and time-series models are used to examine whether accuracy of the forecasts can be predicted, both absolutely and relatively.  Specification of accuracy includes the time forecast was made, forecast horizon, and regional economic/demographic characteristics.  The estimated model is able to predict accuracy of each forecast set at high step lengths but is less successful at low step lengths and is not successful at all in predicting relative accuracy.  Regional characteristics are significant determinants of accuracy for both sets of forecasts, but the significant characteristics differ across methodologies and step lengths.
Tipo: Journal Article
Palavras-chave: Forecasting accuracy; Panel data; Regional economies models.
Ano: 2003
URL: http://purl.umn.edu/43291

Testing for cross-sectional dependence in panel-data models
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: De Hoyos,   Rafael E.; Sarafidis,   Vasilis.
This article describes a new Stata routine, xtcsd, to test for the presence of cross-sectional dependence in panels with many cross-sectional units and few time-series observations. The command executes three different testing procedures—namely, Friedman’s (Journal of the American Statistical Association 32: 675–701) (FR) test statistic, the statistic proposed by Frees (Journal of Econometrics 69: 393–414), and the cross-sectional dependence (CD) test of Pesaran (General diagnostic tests for cross-section dependence in panels [University of Cambridge, Faculty of Economics, Cambridge Working Papers in Economics, Paper No. 0435]). We illustrate the command with an empirical example.
Tipo: Article
Palavras-chave: Xtcsd; Panel data; Cross-sectional dependence; Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/119240

Impactos da influenza aviária no mercado internacional de carnes
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Valente,   Luiza Carneiro Mareti; Gomes,   Marilia Fernandes Maciel; Campos,   Antonio Carvalho.
Animal infectious disease outbreaks as Avian Influenza, Foot and mouth disease and Bovine Spongiform Encephalopathy can influence trade and bring economic consequences to affected countries. For this reason, this work aims to analyze the effects on meat import demand in the years of 1997 and 2003 to 2005, the Avian Influenza outbreaks period. The analytical framework used was panel data econometrics. The results point to a reduction on chicken meat demand in 1997 and increase to the other meats, indicating a possible substitution. From 2003 on, chicken meat demand showed slight increase, as did pig meat, only bovine meat demand showed a reduction. This fact can be explained by a restriction on bovine and chicken supply caused by the imposition of sanitary...
Tipo: Journal Article
Palavras-chave: Avian Influenza; Import demand; Beef; Chicken meat; Panel data; International Relations/Trade.
Ano: 2009
URL: http://purl.umn.edu/94837

Impact of agri‐environmental policies on farming practices and nutrient loading
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Laukkanen,   Marita; Nauges,   Celine.
Tipo: Presentation
Palavras-chave: Common Agricultural Policy; Agri‐environmental regulation; Nutrient loading; Panel data; Finland; Environmental Economics and Policy; Farm Management.
Ano: 2012
URL: http://purl.umn.edu/124347

Causes of farm diversification over time: an Australian perspective on an Eastern Norway model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Culas,   Richard J.
Farm planning often focuses on optimal diversification with respect to risk, where the risk-management strategies combine production, marketing, financial and environmental aspects of the farm-firm. In this study an empirical examination of diversification has been carried out using a sample of farms in Eastern Norway. Four measures of diversification (indices) were defined to record the risks in relation to income from farm production. Using these alternative measures of diversification and panel-data, the results show that larger farms are more diversified, and for farms in more favourable locations and access to labour, the farmers have a greater incentive to spread risk. These results suggest that diversification and farm size are positively linked and...
Tipo: Article
Palavras-chave: Farm diversification; Causes of farm diversification; Panel data; Farm Management.
Ano: 2006
URL: http://purl.umn.edu/122238

On- and Off-Farm Labour Supply of Dutch Dairy Farmers: Estimation and Policy Simulations
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ooms,   Daan L.; Hall,   Alastair R.
This research focuses on the effect of decoupled payments on labour supply of Dutch dairy farmers. 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. We use the panel data sample selection estimation approach Wooldridge (1995) to estimate the off-farm labour supply equation. This method is based on Mundlak's (1978) linear panel data estimation approach, which we use to estimate the on-farm labour supply equations. Even though, simulations show a significant negative effect of decoupled payments on labour supply, the economic significance of this effect is very limited.
Tipo: Conference Paper or Presentation
Palavras-chave: Decoupled payments; Labour supply; Panel data; Sample selection; Policy simulation; Labor and Human Capital; Livestock Production/Industries; C23; C24; C51; C53; D13; J22; Q12; Q18.
Ano: 2005
URL: http://purl.umn.edu/24506

Southeast Asian Agriculture Returns to Scale: Inferences from Cumulative Rolling Stochastic Frontier Analysis
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Xu,   Zhen; Tu,   Wen; Shaik,   Saleem.
In this paper, we estimate the time-varying betas or input elasticities and returns to scale in a stochastic frontier cumulative rolling regression analysis framework using FAO data of Southeast Asian countries from 1960-2002.  Empirical results indicated returns to scale are overestimated by pooled and panel models relative to stochastic frontier models without accounting for technical inefficiencies.  Second, the time-varying estimates of betas or input elasticities and returns to scale indicate variations not only between the models but also over time.
Tipo: Conference Paper or Presentation
Palavras-chave: Southeast Asian countries; Agriculture sector; Time-varying betas or input elasticities and returns to scale; Panel data; 1960-2002; Farm Management; Productivity Analysis.
Ano: 2007
URL: http://purl.umn.edu/9687

Spatial Approaches to Panel Data in Agricultural Economics: A Climate Change Application
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Baylis,   Katherine R.; Paulson,   Nicholas D.; Piras,   Gianfranco.
Panel data are used in almost all subfields of the agricultural economics profession. Furthermore, many research areas have an important spatial dimension. This article discusses some of the recent contributions made in the evolving theoretical and empirical literature on spatial econometric methods for panel data. We then illustrate some of these tools within a climate change application using a hedonic model of farmland values and panel data. Estimates for the model are provided across a range of nonspatial and spatial estimators, including spatial error and spatial lag models with fixed and random effects extensions. Given the importance of location and extensive use of panel data in many subfields of agricultural economics, these recently developed...
Tipo: Journal Article
Palavras-chave: Climate change; Panel data; Spatial econometrics; Environmental Economics and Policy; Resource /Energy Economics and Policy; C33; Q10; Q54.
Ano: 2011
URL: http://purl.umn.edu/113518

Intraindustry Trade and the Environment: Is There a Selection Effect?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Aralas,   Sarma B.; Hoehn,   John P.
Replaced with revised version of paper 08/06/10.
Tipo: Conference Paper or Presentation
Palavras-chave: Environment; Trade; Monopolistic Competition; Selection effect; Environmental quality; Panel data; OECD; Pollution; Environmental Economics and Policy; International Development; International Relations/Trade; Q56; Q51; Q53; Q58; F12; F18.
Ano: 2010
URL: http://purl.umn.edu/61367

IMPACT OF FOREIGN POLITICAL AND INSTITUTIONAL INSTABILITY ON U.S. AGRICULTURAL TRADE
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Awokuse,   Titus O.; Gempesaw,   Conrado M., II.
Very little research exists on the potential impact of political and institutional instability on agricultural trade. This paper evaluates the effects of political instability on U.S. agricultural exports. Relative to effects of potential instability measures, we found that the economic variables are more significant determinants of bilateral agricultural trade.
Tipo: Conference Paper or Presentation
Palavras-chave: Political instability; Agricultural trade; Exports; Panel data; International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/22246

Modeling Exit and Entry of Farmers in a Crop Insurance Program
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Cabas,   Juan H.; Leiva,   Akssell J.; Weersink,   Alfons.
This paper examines the factors influencing farmer participation in crop insurance schemes, but unlike previous studies that focus on total demand, participation is disaggregated into entrants and those exiting. Modeling entry and exit decisions separately illustrates that the effect of a given variable is often muted by aggregation. In addition, the approach in this paper distinguishes between price and yield variables rather than total returns and is consequently able to demonstrate that price variables are particularly important for farmers considering enrolling in crop insurance, while yield variables and other risk management opportunities are more important for farmers who have been in the program but are deciding to exit. The result suggests that...
Tipo: Journal Article
Palavras-chave: Crop insurance; Entry and exit; Panel data; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/44741

Risk Adjusted Productivity Measures
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Glazyrina,   Anna; Shaik,   Saleem.
Tipo: Conference Paper or Presentation
Palavras-chave: Risk; Productivity measures; DEA; Hyperbolic distance function; Panel data; Productivity Analysis; Research Methods/ Statistical Methods; Risk and Uncertainty.
Ano: 2010
URL: http://purl.umn.edu/56580

Democratic Institutions and Environmental Quality: Effects and Transmission Channels
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Romuald,   Kinda Somlanare.
This paper aims at analysing the effect of democratic institutions on environmental quality (carbon dioxide per capita, sulfure dioxide per capita) and at identifying potential channel transmissions. We use panel data from 1960 to 2008 in 122 developing and developed countries and modern econometric methods. The results are as follows: Firstly, we show that democratic institutions have opposite effects on environment quality: a positive direct effect on environment quality and a negative indirect effect through investments and income inequality. Indeed, democratic institutions attract investments that hurt environment quality. Moreover, as democratic institutions reduce income inequality, they also damage environment. Secondly, we find that the direct...
Tipo: Presentation
Palavras-chave: Democratic institutions; Air pollution; Panel data; Income inequality; Investments; Environmental Economics and Policy; O43; Q53; C23; D31; E22.
Ano: 2011
URL: http://purl.umn.edu/120396

Optimal Media Allocation of Generic Fluid Milk Advertising Expenditures: The Case of New York State
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Dong,   Diansheng; Schmit,   Todd M.; Kaiser,   Harry M.
A fixed-effects panel data demand model for five New York State markets is estimated to determine the differential impacts of generic fluid milk advertising by media type. Empirical results indicate that among the four media outlets, television advertising has the largest impact on per capita demand, followed by radio, outdoor, and print. Based on the estimated media-specific elasticities, media reallocation of advertising expenditures suggests that milk sales could increase significantly. The results indicate that cooperative media plan strategies developed between the New York regional advertising program and the national advertising programs would achieve the greatest benefits.
Tipo: Journal Article
Palavras-chave: Generic advertising; Milk; Optimal media allocation; Panel data; Marketing.
Ano: 2007
URL: http://purl.umn.edu/44701

Whale-watching and Herring Fishing: Joint or Independent Production?
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Lee,   Min-Yang A.
The effects of "localized depletion" of a pelagic fishery (herring) on a non-extractive marine activity (tourism) are investigated. Proponents of the localized depletion theory claim that intense fishing effort can lead to areas that are unsuitable for predators like tuna, groundfish, and whales. This leads to poor outcomes for the fishing and whale-watching industries. However, there has been no consensus in the scientific community about the existence of this phenomenon. Localized depletion would be consistent with an economic theory of joint production, in which nearshore herring stocks are an input in production of both herring and whale-watching trips. A unique dataset of daily whale-watching outcomes is combined with fishing effort and oceanographic...
Tipo: Conference Paper or Presentation
Palavras-chave: Whales; Fishing; Panel data; Search; Ecosystem Based Management; Resource /Energy Economics and Policy; Q57; Q26; Q22.
Ano: 2008
URL: http://purl.umn.edu/6086

Food Labels and Weight Loss: Evidence from the National Longitudinal Survey of Youth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mandal,   Bidisha.
This study investigates the role of nutrition and ingredients information, included in the food labels, as useful tools for individuals who are trying to lose weight.  This research has three objectives - examine personal characteristics as predictors of willingness to lose weight conditional on individual's current body mass index, investigate whether those who are trying to lose weight are more likely to read food labels to gather nutritional and ingredients information, and, analyze whether those who want to lose weight and read food labels have a greater propensity to lose weight.  Estimates from random effects logistic regressions indicate higher usage of food labels by those who are trying to lose weight, irrespective of their current body mass...
Tipo: Conference Paper or Presentation
Palavras-chave: Nutritional information; Ingredient information; Body mass index; Panel data; Food Consumption/Nutrition/Food Safety.
Ano: 2008
URL: http://purl.umn.edu/6200

Estimation of multinomial logit models with unobserved heterogeneity using maximum simulated likelihood
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Haan,   Peter; Uhlendorff,   Arne.
In this paper, we suggest a Stata routine for multinomial logit models with unobserved heterogeneity using maximum simulated likelihood based on Halton sequences. The purpose of this paper is twofold. First, we describe the technical implementation of the estimation routine and discuss its properties. Further, we compare our estimation routine with the Stata program gllamm, which solves integration by using Gauss–Hermite quadrature or adaptive quadrature. For the analysis, we draw on multilevel data about schooling. Our empirical findings show that the estimation techniques lead to approximately the same estimation results. The advantage of simulation over Gauss–Hermite quadrature is a marked reduction in computational time for integrals with higher...
Tipo: Journal Article
Palavras-chave: Multinomial logit model; Multinomial logistic model; Panel data; Unobserved heterogeneity; Maximum simulated likelihood; Halton sequences; Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/117572

Factors influencing the long-term competitiveness of commercial milk producers: evidence from panel data in East Griqualand, South Africa
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: du Toit,   J.P.; Ortmann,   Gerald F.; Ramroop,   S.
This study investigates factors influencing the long-term competitiveness of 11 commercial milk producers from East Griqualand (EG), South Africa using unbalanced panel data for the period 1990 to 2006. Results of a ridge regression analysis show that dairy herd size, the level of farm debt, annual production per cow, technology and policy changes over time, and the ratio of trading income to total milk income influence the long-term competitiveness of these milk producers. To enhance their competitiveness in a deregulated dairy market, relatively small and profitable EG milk producers should consider increasing their herd sizes, as the importance of herd size in explaining competitiveness suggests that size economies exist. All EG milk producers should...
Tipo: Journal Article
Palavras-chave: Commercial milk production; Competitiveness; Panel data; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/61998

Modelling The Cattle Breeding Production in the Czech Republic
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Mach,   Jiri; Kristkova,   Zuzana.
This paper proves that the use of the Cobb-Douglas form of production function is suitable for modelling the technological efficiency of selected production factors used in cattle breeding. Furthermore, it is possible to use the estimated function to analyse economic efficiency, considering also the prices of the production factors. The results of the econometric estimation show that higher initial weight affects negatively the dynamics of weight gain. Analysing the efficiency of the two main feedstuff components, i.e. the haylage and hay, it was found out that the increases in weight react inelastically with respect to the volume of feedstuffs, which is in line with the physiological limits of the animal production. The results further reveal that the...
Tipo: Journal Article
Palavras-chave: Cobb-Douglas production function; Panel data; Fixed effects; Gain in weight; Beef fattening.; Livestock Production/Industries; Production Economics; GA; IN.
Ano: 2010
URL: http://purl.umn.edu/96873

Bayesian Estimation of The Impacts of Food Safety Information on Household Demand for Meat and Poultry
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Taylor,   Mykel R.; Phaneuf,   Daniel J.
Consumer reaction to changes in the amount of food safety information on beef, pork, and poultry available in the media is the focus of this study. Specifically, any differences in consumer reactions due to heterogeneous household characteristics are investigated. The data used in this study are monthly data from the Nielsen Homescan panel and cover the time period January 1998 to December 2005. These panel data contain information on household purchases of fresh meat and poultry as well as demographic characteristics of the participating households. The data used to describe food safety information were obtained from searches of newspapers using the Lexis-Nexis academic search engine. Consumer reactions are modeled in this study using a demand system that...
Tipo: Conference Paper or Presentation
Palavras-chave: Food safety; Panel data; Gibbs sampler; Component error; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/49214

Die Zyklik der Profite in der Ernährungswirtschaft: Ein internationaler Vergleich
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Korner,   Julia; Weiss,   Christoph R.
Based upon the structure-conduct-performance approach the present paper analyses determinants of price-cost-margins over the business cycle for food industries in Germany, the USA as well as the Netherlands. Controlling for market structure variables, cyclical fluctuations in profitability are interpreted as evidence for changes in firm behaviour. The econometric panel data models reveal procyclic fluctuations of profits in highly concentrated industries in Germany. In contrast, profitability in competitive industries in Germany as well as in all US food industries are found to be more stable over the business cycle. This observation is explicable in terms of a more aggressive behaviour of firms in boom periods. The econometric model does not adequately...
Tipo: Journal Article
Palavras-chave: Structure-conduct-performance approach; LERNER index; Food industries; Panel data; Germany; Netherlands; USA; Agribusiness; Industrial Organization.
Ano: 2001
URL: http://purl.umn.edu/98878

Analysis of international competitive positioning of quality wine from Spain
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Castillo,Juan Sebastián; García,Mª Carmen.
J.S. Castillo, and M.C. García. 2013. Analysis of international competitive positioning of quality wine from Spain. Cien. Inv. Agr. 40(3): 491-501. The global vitiviniculture sector is undergoing systemic and thorough changes. Spain occupies a privileged position in the global industry, ranking first in surface area, third in production and second in export volume. In recent years, domestic consumption has experienced a clear and pronounced decline, as observed in France and Italy. Therefore, exportation has become the main commercial avenue for table and quality wine. In Spain, designated quality wine represents 50% of total production and has experienced commercial dynamics in international markets that differ from those affecting table wine. The object...
Tipo: Journal article
Palavras-chave: Agricultural economics; Competitiveness; Designation of origin; Foreign trade; Panel data; Quality wine.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300003