Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 40
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A new methodology for assessing the impact of water-pricing scenarios: case study of small-scale irrigation schemes in South Africa AgEcon
Speelman, Stijn; Frija, Aymen; Farolfi, Stefano; Buysse, Jeroen; D'Haese, Marijke F.C.; D'Haese, Luc.
Worldwide growing water scarcity has increased the call for economic instruments to stimulate rational water use in agriculture. In addition cost-recovery is now widely accepted as a cornerstone of sustainable water management. As a consequence now in developing countries, where currently agricultural water use is often still heavily subsidized, a tendency exists of introducing water-pricing as a policy to achieve more sustainable water use. The exact impact of water pricing policies on irrigation water use or on the farmers’ production system is however mostly unknown. A new two-stage methodology that allows estimating at the farm level the effects of introducing or raising a water price on the agricultural production process and water demand is...
Tipo: Conference Paper or Presentation Palavras-chave: Water-pricing; Water savings; Irrigation; Data envelopment analysis; South Africa; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/43836
Imagem não selecionada

Imprime registro no formato completo
A Two-Stage Value Chain Model for Vegetable Marketing Chain Efficiency Evaluation: A Transaction Cost Approach AgEcon
Lu, Hualiang.
We applied a two-stage value chain model to investigate the effects of input application and occasional transaction costs on vegetable marketing chain efficiencies with a farm household-level data set. In the first stage, the production efficiencies with the combination of resource endowments, capital and managerial inputs, and production techniques were evaluated; then at the second stage, the marketing technical efficiencies were determined under the marketing value of the vegetables for three typical marketing chains in Nanjing area, P.R. China. The impacts of the transaction costs to the supply chain technical efficiency both at the production and marketing stages were examined by using Tobit model. Study showed that transaction costs significantly...
Tipo: Conference Paper or Presentation Palavras-chave: Two-stage value chain model; Data envelopment analysis; Technical efficiency; Transaction cost; Vegetable; China; Industrial Organization; D1; D8; Q13; Q18.
Ano: 2006 URL: http://purl.umn.edu/25327
Imagem não selecionada

Imprime registro no formato completo
Agricultural Economics Education in Ukrainian Agricultural Universities: An Efficiency Analysis Using Data Envelopment Analysis AgEcon
Lissitsa, Alexej; Coelli, Tim J.; Rao, D.S. Prasada.
Ukraine's transition from a centrally-planned to a market economy has had a profound effect upon its agricultural sector and agricultural universities. A substantial reduction in state financing has forced universities to adopt a range of survival strategies, with varying degrees of success. In this paper we use data envelopment analysis to examine the technical efficiency of 44 agricultural economics programs from 19 Ukrainian universities during the 2002/03 academic year. Our empirical results indicate wide disparities in performance, ranging from 36% to 100% technical efficiency. A second-stage analysis suggests that factors such as student demand, commercial activities and staff quality help explain a portion of this variation.
Tipo: Conference Paper or Presentation Palavras-chave: Higher education; Ukraine; Efficiency; Data envelopment analysis; Teaching/Communication/Extension/Profession; I21; C14; Q16.
Ano: 2005 URL: http://purl.umn.edu/24482
Imagem não selecionada

Imprime registro no formato completo
Análisis de la productividad en las entidades federativas de México. Colegio de Postgraduados
Freire Basantes, Verónica del Carmen.
En esta investigación se realizó un análisis comparativo de los cambios en la productividad de las entidades federativas de México, durante el período 2005-2010. Para estimar la productividad se utilizó la metodología basada en el Análisis Envolvente de Datos (DEA), bajo el Índice de Productividad de Malmquist (IPM), empleando como producto al PIB estatal y como insumos al capital y mano de obra. Los resultados muestran un descenso general en la productividad del 2005 al 2009, con una recuperación en el 2010; esto se debió principalmente al componente de cambio tecnológico, más que a cambios en la eficiencia técnica. Los desequilibrios regionales principalmente del cuarto período que reflejan los resultados del IPM coinciden con la crisis financiera del...
Palavras-chave: Método envolvente de datos; Inventario de capital; Productividad; Doctorado; Economía; Data envelopment analysis; Capital stock; Productivity.
Ano: 2012 URL: http://hdl.handle.net/10521/1767
Imagem não selecionada

Imprime registro no formato completo
Analyzing Differences in Rural Hospital Efficiency: A Data Envelopment Analysis Approach AgEcon
Nedelea, I. Cristian; Fannin, James Matthew; Barnes, James N..
This study analyzes difference in efficiency among the U.S. rural hospitals using a two-stage, semi-parametric approach. Data Envelopment Analysis is used in the first stage to calculate cost, technical and allocative efficiencies of Critical Access Hospitals (CAH) and non-CAH rural hospitals. Following Simar and Wilson (2007), bootstrapped truncated regressions are used in the second stage to infer on relationship between the cost, technical and allocative inefficiencies of hospitals and some environmental variables. The estimated results show that CAHs are less cost, technical and allocative efficient than non-CAH rural hospitals. The results also show that Medicare cost-based reimbursement for CAHs has a negative effect on the efficiency of these...
Tipo: Conference Paper or Presentation Palavras-chave: Efficiency; Two-stage; Semi-parametric; Bootstrap; Data envelopment analysis; Health Economics and Policy; I12; I18.
Ano: 2010 URL: http://purl.umn.edu/61391
Imagem não selecionada

Imprime registro no formato completo
Application of nonparametric method to improve energy productivity and CO2 emission for barley production in Iran CIGR Journal
Ghasemi Mobtaker, Hassan; Taki, Morteza; Salehi, Marzie; Zarei Shahamat, Ebrahim.
The nonparametric method of data envelopment analysis (DEA) was used to investigate the energy efficiency and CO2 emission of barley farm in Hamedan province of Iran.  The method was used based on eight energy inputs including human labor, machinery, diesel fuel, fertilizers, farmyard manure, biocide, electricity and seed energy and single output of barley yield and technical, pure technical, scale and cross efficiencies were calculated using CCR and BCC models.  The results showed that the average values of technical, pure technical and scale efficiency scores of farmers were 0.788, 0.941 and 0.833, respectively.  Also, energy saving target ratio for barley production was calculated as 11.45%, indicating that by following the recommendations of this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Data envelopment analysis; Energy saving; Barley; Chemical fertilizers.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2618
Imagem não selecionada

Imprime registro no formato completo
Are Hospitals Seasonally Inefficient? Evidence from Washington State Hospitals AgEcon
Friesner, Daniel L.; McPherson, Matthew Q.; Rosenman, Robert.
Efficiency measurement has been one of the most extensively explored areas of health services research over the past two decades. Despite this attention, few studies have examined whether a provider’s efficiency varies on a monthly, quarterly or other, sub-annual basis. This paper presents an empirical study that looks for evidence of seasonal inefficiency. Using a quarterly panel of general, acute-care hospitals from Washington State, we find that hospital efficiency does vary over time; however, the nature of this dynamic inefficiency depends on the type of efficiency being measured. Our results suggest that technical and cost efficiency vary by quarter. Allocative and scale efficiency also vary on a quarterly basis, but only if the data are jointly...
Tipo: Working or Discussion Paper Palavras-chave: Seasonality; Efficiency; Hospitals; Data envelopment analysis; Health Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/12957
Imagem não selecionada

Imprime registro no formato completo
Assessing programmes for the provision of agri-environmental services – An efficiency analysis realized in Southern Germany AgEcon
Kantelhardt, Jochen; Eckstein, Karin; Hoffmann, Helmut.
Agricultural land use does not only concern farmers, but is of high relevance for the environment. Agri-environmental programmes aim to foster the environmental soundness of agricultural production. The aim of this study is to analyse the impact of agri-environmental programmes on the economic and the environmental performance of farms. Using the nonparametric method of Data Envelopment Analysis (DEA), we calculated the economic as well as the environmental efficiencies of farms and examined whether farms are able to succeed in combining environmental and economic efficiency. As study object serves a South German agri-environmental programme, the Bavarian KULAP. A farm survey was conducted covering a total of 102 farmers. The results show that farmers who...
Tipo: Conference Paper or Presentation Palavras-chave: Agri-environmental programme; Data envelopment analysis; Environmental efficiency; Economic efficiency; Environmental Economics and Policy; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/51688
Imagem não selecionada

Imprime registro no formato completo
COST EFFICIENCY OF CATFISH FARMS IN CHICOT COUNTY, ARKANSAS: THE IMPACT OF EXTENSION SERVICES AgEcon
Engle, Carole R.; Kaliba, Aloyce R..
Cost efficiency measures of a sample of catfish farms in Chicot County, Arkansas are estimated using a data envelopment analysis technique. A measure of overall efficiency is used to determine operator's characteristics, farm practices, and institutional support services that are likely to lead to higher farm level cost efficiency. Results indicate that live catfish production could increase by 55% using the same level of inputs if all farms were operating at the minimum average cost curve. Higher feeding rate and availability of extension services were associated with increased cost efficiency. Higher stocking density affected overall efficiency negatively. The marginal value of extension contacts in Chicot County was estimated to be $2988. This study...
Tipo: Conference Paper or Presentation Palavras-chave: Catfish; Cost efficiency; Data envelopment analysis; And extension services; Resource /Energy Economics and Policy; C14; C24; D61.
Ano: 2004 URL: http://purl.umn.edu/34740
Imagem não selecionada

Imprime registro no formato completo
Do farmers provide agri-environmental services efficiently? – An economic analysis AgEcon
Kantelhardt, Jochen; Eckstein, Karin.
Agricultural land use does not only concern farmers, but also has a large number of social and environmental effects. Consequently, it is to be assumed that farmers have to use financial resources as well as labour in order to provide these services. Using the nonparametric method of Data Envelopment Analysis (DEA), we calculated the economic as well as the ecological efficiencies of farms and examined whether farms are able to succeed in combining ecological and economic efficiency. In addition to this analysis, we studied the driving factors of the respective efficiencies. The study was carried out in four typical production regions in Bavaria which vary in their proportions of grassland as well as their yield potential; thus, the study regions reflect a...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural land use; Data envelopment analysis; Ecological efficiency; Economic efficiency; Environmental Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/7973
Imagem não selecionada

Imprime registro no formato completo
Do Field Crop Farms and Mixed Farms of Old and New EU Members Improve Productivity at the Same Rate? A Regional Level Approach AgEcon
Blasejczyk-Majka, Lucyna; Kala, Radoslaw; Maciejewski, Krzysztof.
data contained in the Farm Accounting Data Network (FADN). Analyses covered the first four years following the extension of the European Union in 2004. The adopted units comprised average farms representing 80 regions belonging to eleven countries of EU-15 and four new EU member states. Estimation of the Malmquist total factor productivity (TFP) and its components was conducted using data envelopment analysis, separately for each of the two types of farms taking into consideration their economic size. The main findings concerning the pure technical efficiency change indicate that in the units from the old regions there was a slight improvement for field crop farms and stagnation for mixed farms, and a decrease in the units from the new regions, being...
Tipo: Conference Paper or Presentation Palavras-chave: Data envelopment analysis; Technical efficiency change; Scale efficiency change; Malmquist index; Crop Production/Industries; Productivity Analysis.
Ano: 2011 URL: http://purl.umn.edu/114254
Imagem não selecionada

Imprime registro no formato completo
Does Farm Size and Specialization Matter for Productive Efficiency? Results from Kansas AgEcon
Mugera, Amin W.; Langemeier, Michael R..
In this article, we used bootstrap data envelopment analysis techniques to examine technical and scale efficiency scores for a balanced panel of 564 farms in Kansas for the period 1993–2007. The production technology is estimated under three different assumptions of returns to scale and the results are compared. Technical and scale efficiency is disaggregated by farm size and specialization. Our results suggest that farms are both scale and technically inefficient. On average, technical efficiency has deteriorated over the sample period. Technical efficiency varies directly by farm size and the differences are significant. Differences across farm specializations are not significant.
Tipo: Journal Article Palavras-chave: Bootstrap; Data envelopment analysis; Efficiency; Farms; Farm Management; Production Economics; D24; Q12.
Ano: 2011 URL: http://purl.umn.edu/117947
Imagem não selecionada

Imprime registro no formato completo
Economic and Marketing Efficiency Among Corn Ethanol Plants AgEcon
Sesmero, Juan P.; Perrik, Richard K.; Fulginiti, Lilyan E..
In the corn ethanol industry, the ability of plants to obtain favorable prices through marketing decisions is considered important for their overall economic performance. Based on a panel of surveyed of ethanol plants we extend data envelopment analysis (DEA) to decompose the economic efficiency of plants into conventional sources (technical and allocative efficiency) and a new component we call marketing efficiency. The latter measure allows us to evaluate plants’ ability to contract favorable prices of corn and ethanol relative to spot market prices and its implications for their overall economic performance. Results show that plants are very efficient from a technical point of view. Dispersion in overall economic performance observed across units is...
Tipo: Conference Paper or Presentation Palavras-chave: Corn ethanol; Data envelopment analysis; Economic efficiency decomposition; Marketing efficiency; Mergers; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/101001
Imagem não selecionada

Imprime registro no formato completo
Economic and Marketing Efficiency Among Corn Ethanol Plants AgEcon
Sesmero, Juan P.; Perrin, Richard K.; Fulginiti, Lilyan E..
We extend data envelopment analysis (DEA) to decompose the economic efficiency of a sample of ethanol plants into internal (technical and allocative) and boundary (marketing) sources. This decomposition allows us to evaluate the channels through which different plant characteristics affect plant performance. Results show that plants are very efficient from a technical point of view. Plants with higher production volumes seem to perform better not because of economies of scale but because they can secure more favorable prices (higher marketing efficiency) and execute production plans accordingly (higher allocative efficiency). This may rationalize the increase in the size of the average plant observed in the industry in recent years despite evidence of...
Tipo: Conference Paper or Presentation Palavras-chave: Corn ethanol; Data envelopment analysis; Economic efficiency decomposition; Marketing efficiency; Mergers; Crop Production/Industries; Marketing; Production Economics.
Ano: 2011 URL: http://purl.umn.edu/100709
Imagem não selecionada

Imprime registro no formato completo
Economic Efficiency of Ethanol Plants in the US North Central Region AgEcon
Sesmero, Juan P.; Perrin, Richard K.; Fulginiti, Lilyan E..
In this study we use data envelopment analysis to decompose the overall economic efficiency of a sample of ethanol plants into three subcomponents: technical efficiency, allocative efficiency and a new component we call marketing efficiency. The relative importance of these sources of efficiency is of particular interest given the recent history of bankruptcies, plant closings and ownership change in the industry. Results reveal that observed production units are very efficient from a technical point of view as suggested by a standard deviation of 1% in technical efficiency. However, our results also show that bigger plants tend to be more economically efficient than others. The conventional methodology would have identified this difference as coming from...
Tipo: Conference Paper or Presentation Palavras-chave: Ethanol; Data envelopment analysis; Efficiency decomposition; Marketing efficiency; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/61639
Imagem não selecionada

Imprime registro no formato completo
Efficiency and productivity change of Estonian dairy farms from 2001 - 2009 AgEcon
Luik, Helis; Omel, Raul; Viira, Ants-Hannes.
The purpose of this paper is to analyse productivity change of Estonian dairy farms during the period 2001-2009. Data envelopment analysis (DEA) was used to estimate the technical efficiency of producers and Malmquist productivity index for analysis of productivity change. Estonian FADN data was used in analysis. Performed analysis indicated that Estonian EU accession in 2004 increased considerably total factor productivity. Farm gate milk prices have considerable effect on total factor productivity change. Number of cows and milk yield has positive and dependence on subsidies, stocking density and capital to working hours ratio have negative effects on total factor productivity change.
Tipo: Conference Paper or Presentation Palavras-chave: Malmquist productivity index; Technical efficiency; Technical change; Data envelopment analysis; Dairy production; Livestock Production/Industries; Productivity Analysis.
Ano: 2011 URL: http://purl.umn.edu/114583
Imagem não selecionada

Imprime registro no formato completo
EFICIÊNCIA DA PRODUÇÃO FAMILIAR DE LEITE EM PROJETOS DE ASSENTAMENTO DE REFORMA AGRÁRIA: ESTUDO MULTICASO AgEcon
Pinheiro, Mauro Estenio Facanha; Altafin, Iara Guimaraes.
The milk market changes in Brazil, occured in the last few decades, have challenged the milk producers, especially the smaller ones in relation to milk quality improvement, the reduction of production costs, the adoption of modern practical management technologies and efficiency and productivity gain. The economic sustainability of the producers depends, in great measure, on their success in responding positively to these challenges. This work has aimed to evaluate the technical and economical efficiency of the family dairy production in settlement projects of agrarian reform in the city of Unaí-MG. Information on the production of sixteen producers were collected during an eleven-month period. For evaluating the efficiency, it was used Data Envelopment...
Tipo: Journal Article Palavras-chave: Data envelopment analysis; Efficiency; Family dairy production..
Ano: 2007 URL: http://purl.umn.edu/43709
Imagem não selecionada

Imprime registro no formato completo
Environmental Efficiency Among Corn Ethanol Plants AgEcon
Sesmero, Juan P.; Perrin, Richard K.; Fulginiti, Lilyan E..
Economic viability of the US corn ethanol industry depends on prices, technical and economic efficiency of plants and on continuation of policy support. Public policy support is tied to the environmental efficiency of plants measured as their impact on emissions of greenhouse gases. This study evaluates the environmental efficiency of seven recently constructed ethanol plants in the North Central region of the U.S., using nonparametric data envelopment analysis (DEA). The minimum level of GHG emissions feasible with the available technology is calculated for each plant and this level is used to decompose environmental efficiency into its technical and allocative sources. Results show that, on average, plants in our sample may be able to reduce GHG...
Tipo: Conference Paper or Presentation Palavras-chave: Ethanol; Data envelopment analysis; Life-cycle emissions; Environmental efficiency; Shadow prices; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/61650
Imagem não selecionada

Imprime registro no formato completo
Evaluating Target Achievements in the Public Sector: An Application of a Rare Non-Parametric DEA and Malmquist Indices AgEcon
Odeck, James.
This paper provides an assessment of the extent to which targets set by a public authority are achieved by its operational units. A rare DEA framework and its subsequent Malmquist indices are applied on data comprising 19 units over a four year period of 1996 to 1999. The mean efficiency scores by which targets are achieved across the sample years are moderate, in the range 0.81 to 0.93. Average productivity progress across the sample years has been 26 percent. The results illustrate the usefulness of DEA even when there are no inputs and the decomposable Malmquist index for productivity is an asset in exploring causes of productivity growth.
Tipo: Journal Article Palavras-chave: Target achievement; Traffic safety; Data envelopment analysis; Malmquist indices; L92; C61.
Ano: 2005 URL: http://purl.umn.edu/37549
Imagem não selecionada

Imprime registro no formato completo
Exploring the role of fertilizer application on the sustainability of Greek potato farms: A DEA application AgEcon
Vasileiou, Konstantinos Z..
Farm sustainability is becoming an increasingly important issue to European agriculture. However, fertilizer leaching to groundwater is still a major concern for Greek agriculture. The impact on the maximum potential short-run profit and yield, when fertiliser application dose is limited to certain point, was examined, using Data Envelopment Analysis (DEA). Spring potato farmers were found to apply rather high doses of chemical fertiliser, which poses high potential risk for nitrate and phosphorus leaching to groundwater. However, restricting nitrogen application to the doses recommended by agronomists would imply only little economic and yield sacrifices on potato farms,but resulting to significant reduction to potential environmental risk.
Tipo: Article Palavras-chave: Farm management; Data envelopment analysis; Farm sustainability; Shortrun profit; Environmental Economics and Policy; Farm Management.
Ano: 2010 URL: http://purl.umn.edu/118573
Registros recuperados: 40
Primeira ... 12 ... 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

Valid HTML 4.01 Transitional