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A Bayesian Total Factor Productivity Analysis of Tropical Agricultural Systems in Central-Western Africa And South-East Asia AgEcon
Tonini, Axel; Matus, Silvia Saravia; Gomez y Paloma, Sergio.
This paper computes and analyses total factor productivity (TFP) growth rates for tropical agricultural systems in Central-Western Africa and South-East Asia. Two regions that despite sharing common agro-ecological conditions, have pursued different adoption rates of green revolution technology and have reported dissimilar yields per hectare. A panel data set is constructed for the period 1987-2007 from the FAOSTAT database. A Bayesian stochastic frontier model with country specific temporal variation in technical efficiency is estimated. Technical efficiency estimates reveal that there is substantial room for improvement in both continental sub-sets and that TFP estimates show on average larger rates of growth for South-East Asian countries as compared to...
Tipo: Conference Paper or Presentation Palavras-chave: Bayesian Inference; Stochastic Production Frontier; Time Varying Technical Inefficiency; Total Factor Productivity Growth; Tropical Agricultural Systems; Farm Management; Productivity Analysis; C15; D24; O47.
Ano: 2011 URL: http://purl.umn.edu/116088
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Trip-Level Analysis of Efficiency Changes in Oregon's Deepwater Trawl Fishery AgEcon
Tomberlin, David; Holloway, Garth J..
In 2003, an industry-financed, government-administered buyback of trawl fishing permits and vessels took place on the US West Coast, resulting in the retirement of about one-third of the limited-entry trawl fleet. The lack of cost data in this fishery precludes an analysis of how the buyback has affected profitability, but changes in technical efficiency can provide some insight into the program's effects. This paper, the first of a planned series of analyses of the buyback's effect on technical efficiency in the trawl fleet, applies stochastic frontier analysis to assess whether technical efficiency changed perceptibly after 2003. We adopt a hierarchical modeling approach estimated with Markov Chain Monte Carlo methods, and present results from both...
Tipo: Working or Discussion Paper Palavras-chave: Fishery Buyback; Technical Efficiency; Stochastic Production Frontier; Bayesian Inference; Markov Chain Monte Carlo; Resource /Energy Economics and Policy; Q2; L5; C1.
Ano: 2007 URL: http://purl.umn.edu/8223
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Will Small-Scale Dairy Producers in Kenya Disappear Due to Economies of Scale in Production? AgEcon
Omiti, John M.; Wanyoike, F.; Staal, Steven J.; Delgado, Christopher L.; Njoroge, L..
There is growing policy concern regarding the competitiveness of small-scale livestock production in the wake of the contemporary livestock revolution in many developing countries. In Kenya, this debate has focused on economies of scale and the undue influence of policy distortions on promoting the scaling up of dairy farms. This paper seeks to investigate economies of scale in Kenyan dairy in terms of relative profit efficiency at different levels of output, and identify policy and technology options to help small-scale farmers develop solutions to the challenges of competition. Data were collected from 204 dairy producers of different farm sizes in rural Kiambu and Thika, and urban Nairobi districts and a stochastic frontier model approach was used to...
Tipo: Conference Paper or Presentation Palavras-chave: Dairy Production; Stochastic Production Frontier; Efficiency; Profitability; Livestock Production/Industries; C21; Q12.
Ano: 2006 URL: http://purl.umn.edu/25674
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台灣鳳梨農場技術效率之研究 Taiwan Agricultural Research Institute
陳唐平; 楊世華; 潘德芳; Tarng-Ping Chen; Shi-Hua Yang; Te-Fang Pan.
[[abstract]]鳳梨栽植品種及其生產投入數量對於技術效率具影響效果。本文乃根據種植開英種、台農6號、11號、13號、16號、17號及其他品種等台灣主要鮮食鳳梨品種之樣本農戶建立鳳梨邊界生產函數並探討影響技術效率之因子。依研究分析結果發現:鳳梨生產邊界函數適用 Cobb-Douglas 函數形式,就生產彈性而言,依其估計結果,以勞動投入的0.5876最大,變動成本投入的0.2744次之,而土地面積的0.1641最小;規模報酬大於1,顯示鳳梨農場具備規模遞增的特性;而效率的組合誤差同時受非人力及人為管理因素的影響。個別鳳梨農場技術無效率值介於1.59%~65.13%之間,顯示尚有很大的提升空間。根據技術效率影響因子的測定結果,變動成本及固定成本投入量、經營主栽植鳳梨的經驗年數、鳳梨種植面積佔總農場面積的百分比、台農6號、台農11號、台農13號及其他種鳳梨種植面積佔總鳳梨種植面積的百分比對效率提升有正面助益。因此,農場主對於人為管理因素應不斷加強,可朝增加變動與固定成本投入、提高勞動素質及慎選品種等方面著手。
Palavras-chave: 鳳梨 技術效率 隨機性生產邊界 Cobb-Douglas函數 Pineapples; Technical Efficiency; Stochastic Production Frontier; Cobb-Douglas Function [[classification]]12.
Ano: 2010
Registros recuperados: 4
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