Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados AgEcon (98) Autor Sauer, Johannes (6) Hockmann, Heinrich (5) Latruffe, Laure (5) Langemeier, Michael R. (4) Balint, Borbala (3) Brümmer, Bernhard (3) Curtiss, Jarmila (3) Pieniadz, Agata (3) Bravo-Ureta, Boris E. (2) Cespedes-Lorente, Jose (2) Featherstone, Allen M. (2) Fogarasi, Jozsef (2) Galdeano-Gomez, Emilio (2) Kaditi, Eleni A. (2) Lence, Sergio H. (2) Lerman, Zvi (2) Morgenstern, Richard D. (2) Mugera, Amin W. (2) Nin Pratt, Alejandro (2) Nitsi, Elisavet I. (2) Mais... Palavra-chave D24 (98) Q12 (39) Productivity Analysis (33) Production Economics (24) Agricultural and Food Policy (17) Farm Management (15) Technical efficiency (15) Crop Production/Industries (13) Agribusiness (11) Efficiency (10) Productivity (9) Research Methods/ Statistical Methods (9) Agriculture (8) C61 (8) Land Economics/Use (8) C23 (7) Environmental Economics and Policy (7) Livestock Production/Industries (7) O47 (7) Research and Development/Tech Change/Emerging Technologies (7) Mais... Tipo do documento Conference Paper or Presentation (55) Journal Article (19) Working or Discussion Paper (16) Working Paper (4) Presentation (2) Report (1) Thesis or Dissertation (1) Mais... Ano 2012 (5) 2011 (16) 2010 (8) 2009 (22) 2008 (4) 2007 (5) 2006 (10) 2005 (13) 2004 (5) 2003 (4) 2002 (4) 2000 (1) 1998 (1) Mais... País United States (98) Idioma Inglês (95) Espanhol (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 98 Primeira ... 1 2 3 4 5 ... Última Think Again: Higher Elasticity of Substitution Increases Economic Resilience AgEcon Dumas, Patrice; Hallegatte, Stephane. This paper shows that, counter-intuitively, a higher elasticity of substitution in model production function can lead to reduced economic resilience and larger vulnerability to shocks in production factor prices. This result is due to the fact that assuming a higher elasticity of substitution requires a recalibration of the production function parameters to keep the model initial state unchanged. This result has consequences for economic analysis, e.g., on the economic vulnerability to climate change. Tipo: Working or Discussion Paper Palavras-chave: Substitution; Calibration; Constant Elasticity of Substitution; Shock; Risk and Uncertainty; D24; E17; E23. Ano: 2009 URL: http://purl.umn.edu/54283 Productivity and Environmental Performance in Marketing Cooperatives: Incentive Schemes on the Horticultural Sector AgEcon Galdeano-Gomez, Emilio; Cespedes-Lorente, Jose; Rodriguez-Rodriguez, Manuel. The object of the present paper is to analyze the productivity of marketing cooperatives incorporating environmental inputs/outputs. In the European agricultural policy, expectations for attaining sustainable and competitive agriculture lie to a great extent on the cooperative sector's ability to adapt to the new market conditions. These challenges have led marketing cooperatives in the fruit and vegetables sector to consider improvement in productivity and sound environmental performance. In this sector environmental management was intensified by the Common Agrarian Policy (CAP) through incentives on the so-called Operative Programs (OP). The present study analyses the total factor productivity (TFP) related to environmental variables in this sector using... Tipo: Conference Paper or Presentation Palavras-chave: Productivity; Environmental performance; Parametric approach; Efficiency; Marketing cooperative; Horticultural sector; Agribusiness; Environmental Economics and Policy; Productivity Analysis; D24; Q13; Q21; L15. Ano: 2006 URL: http://purl.umn.edu/25738 An Updated Look at the Recovery of Agricultural Productivity in Sub-Saharan Africa AgEcon Nin Pratt, Alejandro; Yu, Bingxin. We analyze the evolution of Sub-Saharan Africa’s agricultural total factor productivity (TFP) over the past 40 years, looking for evidence of recent changes in growth patterns using a nonparametric Malmquist index. Our TFP estimates show a remarkable recovery in the performance of Sub-Saharan Africa’s agriculture during between 1984 and 2003 after a long period of poor performance and decline. That recovery is the consequence of improved efficiency in production resulting from changes in the output structure and an adjustment in the use of inputs, including an overall net reduction in fertilizer use but increased fertilizer use in most of the best-performing countries. Policy changes implemented by African countries between the mid-1980s and the second... Tipo: Conference Paper or Presentation Palavras-chave: Agriculture; Total factor productivity; Sub-Saharan Africa; Agricultural and Food Policy; Productivity Analysis; D24; Q18. Ano: 2009 URL: http://purl.umn.edu/51731 The Market Value of Variable Renewables AgEcon Hirth, Lion. The income that wind and solar power receive on the market is affected by the variability of their output. At times of high availability of the primary energy source, they supply electricity at zero marginal costs, shift the supply curve (merit-order curve) to the right and thereby reduce the equilibrium price of electricity during that hour. The size of this merit-order effect depends on the amount of installed renewable capacity, the slope of the merit-order curve, and the intertemporal flexibility of the electricity system. Thus the price of wind power falls with higher penetration rates, even if the average electricity price remains constant. This work quantifies the effect of variability on the market value of renewables using a calibrated model of... Tipo: Working Paper Palavras-chave: Wind Power; Solar Power; Electricity Market; Power Generation Economics; Renewables; Value Factor; Numerical Modelling; Resource /Energy Economics and Policy; Q42; O13; D24; D61. Ano: 2012 URL: http://purl.umn.edu/122021 Food Safety Regulation and Firm Productivity: Evidence from the French Food Industry AgEcon 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 Evading Farm Support Reduction via Efficient Input Use: The Case of Greek Cotton Growers AgEcon Pantzios, Christos J.; Rozakis, Stelios; Tzouvelekas, Vangelis. The present paper examines the importance that efficient resource use may have for cotton growers under the current EU policy regime. To that end, input-oriented technical and scale efficiency score for a sample of 172 cotton-growing farms are empirically quantified. The results suggest that cotton farms in the sample are not efficient mainly due to the nature of the policy regime governing the sector throughout EU. By becoming efficient, the co-responsibility levy will be reduced by 18.3% and farms may increase their profits by 50.1% on the average. Tipo: Journal Article Palavras-chave: Co-responsibility levy; Cotton farms; Goal programming; Greece; Scale and technical efficiency; Stochastic frontier model; Production Economics; D24; Q12; Q16; C61. Ano: 2006 URL: http://purl.umn.edu/43787 Measurement of dynamic efficiency, a directional distance function parametric approach AgEcon Serra, Teresa; Stefanou, Spiro E.; Oude Lansink, Alfons G.J.M.. This research proposes a parametric estimation of the structural dynamic efficiency measures proposed by Silva and Oude Lansink (2009). Overall, technical and allocative efficiency measurements are derived based on a directional distance function and the duality between this function and the optimal value function. The applicability of the parametric proposal is illustrated by assessing dynamic efficiency ratings for a sample of Dutch dairy farms observed from 1995 to 2005. Tipo: Conference Paper or Presentation Palavras-chave: Structural dynamic efficiency; Dairy farms; Parametric approach; Agricultural and Food Policy; Farm Management; Land Economics/Use; D21; D24; D61; D92. Ano: 2010 URL: http://purl.umn.edu/61107 Agricultural Prices, Selection, and the Evolution of Food Industry AgEcon Gaigne, Carl; Le Mener, Leo. In this paper, we set up a simple model that explains the relation between low input price, high exit rates and industrial oncentration. More precisely, we argue that falling input prices force firms with low productivity to exit and induce expansion of more efficient incumbents at the expense of less productive producers. Our model helps reconcile some well‐established empirical results regarding the food processing industry. Indeed, agricultural prices have been declining between the early 1900s until 2006 while, over the same period, concentration and firm productivity have been increasing in the agri‐food industry. Tipo: Working Paper Palavras-chave: Input price; Downstream industry; Entry/exit; Industrial concentration; Firm heterogeneity; Agricultural and Food Policy; Industrial Organization; International Relations/Trade; D24; L11; L25; L66. Ano: 2012 URL: http://purl.umn.edu/125221 Opportunity Costs of Providing Crop Diversity in Organic and Conventional Farming: Would Targeted Environmental Policies Make Economic Sense? AgEcon Sipilainen, Timo; Huhtala, Anni. Targeted environmental policies for farmlands may improve the cost-efficiency of conservation programs if one can identify the farms that produce public goods, or environmental outputs, with the least cost. We derive shadow values of producing crop diversity on conventional and organic crop farms to examine their opportunity costs of conservation. Non-parametric distance functions are estimated by applying data envelopment analysis to a sample of Finnish crop farms for the period 1994 – 2002. Our results show that there is variation in the shadow values between farms and the technologies adopted. The extent of cost heterogeneity and farms’ potential for specialization in the production of environmental outputs determine whether voluntary programs such as... Tipo: Conference Paper or Presentation Palavras-chave: Biodiversity; Shannon index; DEA; Distance functions; Shadow values; Crop Production/Industries; Environmental Economics and Policy; C21; D24; H41; Q12; Q24. Ano: 2011 URL: http://purl.umn.edu/114527 Effect of contract farming on productivity and income of small holders: The case of tea production in north-western Vietnam AgEcon Saigenji, Yoshiko; Zeller, Manfred. This paper examines potential of contract farming as a rural development tool by revealing its effect on productivity and income of small holders in tea production in north-western Vietnam. In the present research, three economic analyses are applied. First, the technical efficiency of tea production is estimated by using stochastic frontier model. The results show that contract farming achieved significantly higher technical efficiency compared to non-contract farming. Second, logit model is investigated to determine the influential socio-economic characteristics of households for contract participation. The model indicates that social relationship of households, such as the membership in the communist party, play an important role in contract... Tipo: Conference Paper or Presentation Palavras-chave: Contract farming; Tea; Vietnam; Community/Rural/Urban Development; Crop Production/Industries; Food Security and Poverty; Productivity Analysis; C21; D24; O12; Q12. Ano: 2009 URL: http://purl.umn.edu/51681 TECHNICAL AND ECONOMIC EFFICIENCY OF RUSSIAN CORPORATE FARMS: THE CASE OF THE MOSCOW REGION AgEcon Svetlov, Nikolai M.; Hockmann, Heinrich. The research focus of the paper is to distinguish allocative and technical inefficiencies on Moscow region corporate farms. DEA specifications with both monetary and technical objective functions are applied. Reduced costs and sensitivity analyses are used to identify fixed inputs constraining either allocative or technical efficiency. To decrease heterogeneity and allow for the accessibility to different technologies of a given farm, the farms are grouped with respect to the set of outputs they produce. Thus, as a result of an unstable market environment, it is shown that allocative inefficiency causes 65-100 % (depending on the group) of total inefficiency in 2002 and 60-96 % in 1999. As for technical inefficiency, in 1999 its major source was the lack... Tipo: Working or Discussion Paper Palavras-chave: Technical inefficiency; Allocative inefficiency; Data Envelopment Analysis; Moscow region; Transitional economy; Farm Management; Productivity Analysis; D24; Q12; C14. Ano: 2005 URL: http://purl.umn.edu/14922 Mixed Crop Livestock Farming Incorporating Agroforestry Orchards Facing the New Cap AgEcon Ducros, Denis; Kephaliacos, Charilaos; Ridier, Aude. In the context of the new CAP, decoupling subsidies from production should incite farmers to reorganize their production systems, particularly through diversification opportunities. In this paper we focus our analysis on the conditions that could permit the development of extensive orchards by modelling mixed crop livestock farms, which incorporate orchards. A mathematical programming model is built to simulate various intensification levels characterizing different technical pathways within the different farm activities (cattle breeding, forage fields, arboriculture). This model also enables us to take into account some environmental indicators related to these pathways. Moreover, the method illustrates technical complementarities existing within the... Tipo: Conference Paper or Presentation Palavras-chave: Decoupling; Diversification; Agroforestry orchards; Joint production; Mathematical programming; Agribusiness; C61; D24; Q12; Q21. Ano: 2005 URL: http://purl.umn.edu/24532 Imposing Curvature Conditions on Flexible Functional Forms to GNP Functions AgEcon Chapda Nana, Guy; Larue, Bruno. This paper empirically investigates the implications of the imposition of convexity in output prices and concavity in factor endowments on flexible functional forms for the GNP function. Using macroeconomic data for Switzerland, we estimate the Translog and the Symmetric Normalized Quadratic forms to investigate the manner with which curvature restrictions are imposed, the extend of curvature violations and the robustness of estimated elasticities. We also compare the predictive accuracy of the aforementioned flexible functional forms. Our result show that concavity in factor endowments is violated much more often than convexity in output prices. For the Translog, the date at which local restrictions are imposed matters a great deal in terms of remaining... Tipo: Working Paper Palavras-chave: GNP function; Flexible functional forms; Curvature violations; Elasticities; International Relations/Trade; Research Methods/ Statistical Methods; D24; C30. Ano: 2012 URL: http://purl.umn.edu/123308 Structural Change in Transition: A Role for Organizational Legitimacy? Evidence from Czech Agriculture AgEcon Curtiss, Jarmila; Brümmer, Bernhard; Medonos, Tomas; Weaver, Robert D.. Market liberalization in Central and Eastern Europe was targeted at establishing incentives that would improve economic performance. While substantial reorganization of enterprises is observed, firms can also be observed which devote resources towards establishing organizational legitimacy. Motivations for such behavior are considered and empirical evidence of its relationship with technical efficiency using a distance function approach is analyzed for the case of Czech agriculture. Contrary to the expectation that such behavior would be inefficient, we find that firms reap private economic gains from legitimacy efforts through improved access to agricultural land, investment subsidies and firm internal social capital. However, its effect on technical... Tipo: Conference Paper or Presentation Palavras-chave: Organizational legitimacy; Efficiency; Structural change; Transition; Agriculture; Industrial Organization; D21; D23; D24. Ano: 2005 URL: http://purl.umn.edu/24557 Will the EU Single Area Payment decrease farm efficiency in the New Member States? AgEcon Douarin, Elodie; Latruffe, Laure. This paper starts the debate regarding the likely impact of post-accession public support in the New Member States on their farming sector’s efficiency. While one aim of farm support in the European Union (EU) is to promote efficient farms that can compete internationally, a higher level of support via the Single Area Payment (SAP) may have adverse effects on farms’ performance. Analyses using pre-accession technical efficiency scores calculated with Data Envelopment Analysis (DEA) and post-accession farmer’s intentions, lead to the conclusion that the implementation of the SAP may decrease farm efficiency. The main reasons are the negative link between farm efficiency and subsidies already present in pre-EU accession Lithuania, and the change in... Tipo: Conference Paper or Presentation Palavras-chave: Single Area Payment; Technical efficiency; Size; Subsidies; Lithuania; Agricultural and Food Policy; Productivity Analysis; D24; Q12. Ano: 2009 URL: http://purl.umn.edu/51625 The Impact of Group-Based Credit on Demand for Productive Inputs and Agricultural Productivity in Rural Kenya AgEcon Mghenyi, Elliot W.. Tipo: Conference Paper or Presentation Palavras-chave: Agricultural credit; Joint liability; Productive inputs; Productivity; Agricultural Finance; International Development; Productivity Analysis; Risk and Uncertainty; D24; Q14; R34. Ano: 2009 URL: http://purl.umn.edu/49470 EFFECTS OF QUALITY CONSIDERATIONS AND CLIMATE/WEATHER INFORMATION ON THE MANAGEMENT AND PROFITABILITY OF COTTON PRODUCTION IN THE TEXAS HIGH PLAINS AgEcon Britt, Megan L.; Ramirez, Octavio A.; Carpio, Carlos E.. Production function models for cotton lint yields, seed yields, turnout, and lint quality characteristics are developed for the Texas High Plains. They are used to evaluate the impacts of quality considerations and of climate/weather information on the management decisions and on the profitability and risk of irrigated cotton production systems. It is concluded that both quality considerations and improved climatic/weather information could have substantial effects on expected profitability and risk. These effects mainly occur because of changes in optimal variety selection an irrigation water use levels. Quality considerations in particular result in significantly lower irrigation water use levels regardless of the climate/weather information... Tipo: Journal Article Palavras-chave: Climatic/weather information; Cotton quality; Ground water resource use; Risk and uncertainty; Texas High Plains; Crop Production/Industries; D21; D24; D61; D81; D84. Ano: 2002 URL: http://purl.umn.edu/15082 Technical efficiency and technology gaps in beef cattle production systems in Kenya: A stochastic metafrontier analysis AgEcon Otieno, David Jakinda; Hubbard, Lionel J.; Ruto, Eric. In this study the stochastic metafrontier method is used to investigate technical efficiency and technology gaps across three main beef cattle production systems in Kenya. Results show that there is significant inefficiency in nomadic and agro-pastoral systems. Further, in contrast with ranches, these two systems were found to have lower technology gap ratios. The average pooled technical efficiency was estimated to be 0.69, which suggests that there is considerable scope to improve beef production in Kenya Tipo: Conference Paper or Presentation Palavras-chave: Technical efficiency; Technology gap; Beef cattle; Production systems; Stochastic metafrontier; Kenya.; Livestock Production/Industries; D24; O32; Q18. Ano: 2011 URL: http://purl.umn.edu/108947 Measuring Technical Efficiency of Dairy Farms with Imprecise Data: A Fuzzy Data Envelopment Analysis Approach AgEcon Mugera, Amin W.. This article integrates fuzzy set theory in Data Envelopment Analysis (DEA) framework to compute technical efficiency scores when input and output data are imprecise. The underlying assumption in convectional DEA is that inputs and outputs data are measured with precision. However, production agriculture takes place in an uncertain environment and, in some situations, input and output data may be imprecise. We present an approach of measuring efficiency when data is known to lie within specified intervals and empirically illustrate this approach using a group of 34 dairy producers in Pennsylvania. Compared to the convectional DEA scores that are point estimates, the computed fuzzy efficiency scores allow the decision maker to trace the performance of a... Tipo: Conference Paper or Presentation Palavras-chave: Fuzzy set theory; Data Envelopment Analysis; Membership function; Α-cut level; Technical efficiency; Farm Management; Production Economics; Productivity Analysis; Research Methods/ Statistical Methods; Risk and Uncertainty; D24; Q12; C02; C44; C61. Ano: 2011 URL: http://purl.umn.edu/103251 China’s Electricity Market Reform and Power Plants Efficiency AgEcon Ma, Chunbo; Zhao, Xiaoli; Ma, Qian; Zhao, Yue. In the past three decades, Chinese electricity industry has experienced a series of regulatory reforms serving different purposes at different stages. In 2002, the former vertically integrated electricity utility - the State Power Corporation (SPC) – was divested and the generation sector was separated from the transmission and distribution networks in an effort to improve production efficiency. In this paper we study the impact of the reform on efficiency of fossil-fired power plants using plant-level data during 2000-2008. Our results from the data envelopment analysis (DEA) and panel regressions show that: 1) the total factor productivity (TFP) growth mainly comes from technological change; 2) the technical efficiency of previously SPC-managed power... Tipo: Working or Discussion Paper Palavras-chave: Efficiency; DEA; Malmquist Index; China; Electricity; Industrial Organization; Productivity Analysis; Resource /Energy Economics and Policy; D24; L11; L51; L94; L98. Ano: 2011 URL: http://purl.umn.edu/117811 Registros recuperados: 98 Primeira ... 1 2 3 4 5 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco