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| Registros recuperados: 41 | |
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| 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 |
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| qasemi kordkheili, peyman. |
| Grape fruit production has increasing rate in recent years. In this study a non-parametric method of Data Envelopment Analysis (DEA) has used to estimate the energy efficiency of grape fruit production orchards in Sari region of Iran. Additionally, the impacts of energy inputs on grape fruit yield were determined. Data were collected using a face-to-face questionnaire method from 71 orchardists in winter 2014. The results showed that the total energy consumption was 49.8 GJ ha–1 and chemical fertilizers by 28% of this quantity had highest share on total input energy. The results of CCR and BCC models of DEA showed that from total of 71 orchardists, only 21 orchards were technical efficient by efficiency score of 1 and 43 orchards were pure technical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data envelopment analysis; Energy indices; Energy saving; Grape fruit production. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3020 |
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| REGO,MARCELO A.S.; SABBAG,OMAR J.; SOARES,ROBERTA B.; PEIXOTO,SILVIO. |
| Abstract Shrimp farming has a great ecological, economic, and social importance in northeastern Brazil. Although the conventional farming system is widely used, biofloc technology (BFT) system has been developed to reduce environmental impacts and optimizing the production. Thus,the present study evaluated the technical efficiency of production cycles of Litopenaeus vannamei in conventional and BFT systems.We analyzed 48 production cycles in the conventional system in 2013 and 2014 and 9 cycles in the BFT system in 2014 through data envelopment analysis (DEA). The inputs corresponded to the population density (post-larvae m-2), amount of feed (kg ha-1 cycle-1), labor (man ha-1) and power supply (HP ha-1), whereas the yield (kg ha-1 cycle-1) was considered... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data envelopment analysis; Inefficiency; Productive systems; Shrimp farming. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703705 |
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| 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... |
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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 |
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| 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 |
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| 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 providers 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 |
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| Wu, Ya; Escalante, Cesar L.; Gunter, Lewell F.. |
| This study employed data envelopment analysis (DEA) to evaluate the comparative efficiency performance of selected commercial banks, rural financial institutions and microfinance institutions in China. The first pairwise comparison indicated that commercial banks achieved higher level of overall technical efficiency, pure technical efficiency and scale efficiency than rural financial institutions (including RCCs) through the study period (2004-2007). Overall technical inefficiency seems to be more attributed to scale inefficiency rather than pure technical inefficiency for both commercial banks and rural financial institutions. The second pairwise comparison indicated that RCCs and CFPA are the most efficient institutions with efficiency scores of 1... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Microfinance; China; Data envelopment analysis; Technical inefficiency; Scale efficiency; Agricultural Finance. |
| Ano: 2010 |
URL: http://purl.umn.edu/61158 |
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| 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 |
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| Registros recuperados: 41 | |
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