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A META-ANALYSIS OF TECHNICAL EFFICIENCY IN NIGERIAN AGRICULTURE AgEcon
Ogundari, Kolawole.
This study sheds light on how study specific-characteristics impact mean technical efficiency (MTE) in Nigerian agriculture. Also the paper extracts consensus message about MTE and its drivers in Nigerian agriculture based on studies covering the period 1999-2008. A meta-analysis using truncated regression was employed on a total of sixty four studies which yield eighty six observations for the econometric analysis. The regression results show that MTE in Nigerian agriculture increased significantly over the years. Study specific-characteristics such as sample size, number of inputs used as well as studies with focus on crop and livestock production were found to significantly impact MTE. Further analyses show that studies in the Northcentral, Southwest,...
Tipo: Conference Paper or Presentation Palavras-chave: Meta-regression; Technical Efficiency; Truncated Regression; Agriculture; Nigeria; Agricultural and Food Policy; Production Economics; Productivity Analysis; D24; Q12.
Ano: 2009 URL: http://purl.umn.edu/50327
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A meta-analysis of the response of calorie demand to income changes AgEcon
Ogundari, Kolawole; Abdulai, Awudu.
Over the past three decades, several studies have analyzed the response of calorie intake to income with varying and inconclusive results. This paper review these studies and employs meta-analysis to examine the potential bias in the calorie-income elasticity, as well as the impact of specific study attributes on these elasticities reported in the empirical literature. A total of 40 studies which yielded 99 estimated elasticities were considered. The results show the presence of publication (reporting) selection bias in the reported elasticities. Besides, the estimates revealed evidence of positive and significant empirical effect of income on calorie intake from all the studies that goes beyond publication bias. Study attributes such as ranking of the...
Tipo: Presentation Palavras-chave: Calorie-income elasticity; Heterogeneity; Meta-analysis; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; D12; C01.
Ano: 2012 URL: http://purl.umn.edu/123287
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Estimating Technical Efficiency, Input substitution and complementary effects using Output Distance Function: A study of Cassava production in Nigeria AgEcon
Ogundari, Kolawole; Brümmer, Bernhard.
In this study, we estimate an output distance function in the context of a multi-output and multi-input production technology by stochastic frontier techniques. Unbalanced panel data for smallholder farms that grown cassava and other crops in Southwestern Nigeria covering 2006/07 to 2008/09 farming seasons is used for the analysis. The results show that the marginal rate of transformation (MRT) between “other crops” grown by the farmers and cassava produced relative to the output mix is negative and significantly different from zero. We observed also that increasing returns-to-scale as well as technical progress characterized cassava production in the region. Furthermore, fertilizer and pesticides are found to have significant substitution effects on...
Tipo: Journal Article Palavras-chave: Cassava; Technical efficiency; Inputs substitution; Complementary effects; Crop Production/Industries.
Ano: 2010 URL: http://purl.umn.edu/95773
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