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| Registros recuperados: 98 | |
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| Aldaz, Natalia; Millan, Joaquin A.. |
| En este trabajo se realiza un análisis comparado de dos métodos no paramétricos de medida de productividad total de los factores con datos de panel basados en programación: índices de Malmquist y un modelo DEA intertemporal que permite acotar las medidas de eficiencia y progreso técnico, suponiendo cambio técnico no regresivo. La aplicación se realiza sobre las agriculturas de los países de la Unión Europea, encontrándose algunas diferencias importantes entre ambos enfoques. Los resultados sugieren menor crecimiento de productividad agraria y, sobre todo, una ordenación distinta de países en relación con dichos crecimientos que los encontrados en otros trabajos. Palabras clave: Productividad, DEA, Agricultura, Europa, Datos de panel. SUMMARY This paper... |
| Tipo: Journal Article |
Palavras-chave: Productivity; DEA; Agriculture; Europe; Panel data; Agricultural and Food Policy; D24; O47; Q10. |
| Ano: 2003 |
URL: http://purl.umn.edu/28796 |
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| Sauer, Johannes; Balint, Borbala. |
| This research aims at shedding empirical light on the relative efficiency of small-scale maize producers in Romania. Farmers in transition countries still face heavily distorted price systems resulting from imperfect market conditions and socioeconomic and institutional constraints. To capture such distortions we formulate a stochastic shadow-cost frontier model to investigate the systematic input-specific allocative inefficiency. We further adjust the underlying cost frontier by incorporating shadow price corrections and subsequently reveal evidence on farm specific technical inefficiency. Different models are estimated due to the imposition of curvature correctness and the effects on the individual efficiency estimates are shown. The empirical results... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Efficiency; Shadow Cost Frontier; Functional Consistency; Maize; Romania; Crop Production/Industries; C40; D24; O33. |
| Ano: 2006 |
URL: http://purl.umn.edu/25597 |
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| Tumusiime, Emmanuel; Brorsen, B. Wade; Mosali, Jagadeesh; Johnson, Jim; Locke, James; Biermacher, Jon T.. |
| The parameters of yield response functions can vary by year. Past studies usually assume yield functions are nstochastic ‘‘limited’’ stochastic. In this study, we estimate rye– ryegrass yield functions in which all parameters are random. The three functional forms considered are the linear response plateau, the quadratic, and the Spillman-Mitscherlich. Nonstochastic yield models are rejected in favor of stochastic parameter models. Quadratic functional forms fit the data poorly. Optimal nitrogen application recommendations are calculated for the linear response plateau and Spillman-Mitscherlich. The stochastic models lead to smaller recommended levels of nitrogen, but the economic benefits of using fully stochastic crop yield functions are small because... |
| Tipo: Journal Article |
Palavras-chave: Cereal rye–ryegrass; Monte Carlo; Nitrogen; Random parameters; Stochastic plateau; Production Economics; Q10; C12; D24. |
| Ano: 2011 |
URL: http://purl.umn.edu/117949 |
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| Me-Nsope, Nathalie Mongue. |
| The study investigates the economic response of tart cherry yields to planting density using an unbalanced longitudinal yield data from tart cherry orchards in Northwest Michigan. The relationship between tart cherry yield and tree age is specified as a linear spline function and planting density interacts with tree age. A random effect method, treating block as random, is used to estimate the spline function. Stochastic simulation was used to estimate the mean and variance of the product of two random variables (price and yield), and the coefficient of variation was used as a measure of how much risk is involved in corn/soybeans production relative to tart cherries production. Estimates of the variance provided the discount factor (10%) and with yields... |
| Tipo: Thesis or Dissertation |
Palavras-chave: Tart cherries; Pricing; Planting density; Crop Production/Industries; Risk and Uncertainty; D4; D24; L11. |
| Ano: 2009 |
URL: http://purl.umn.edu/54502 |
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| Olavarria, Jaime A.; Bravo-Ureta, Boris E.; Cocchi, Horacio. |
| Resumen: El objetivo de este trabajo es medir el cambio de la productividad en la agricultura chilena durante el período 1961-96. La Productividad Total de los Factores (PTF) fue calculada mediante índices Törnqvist. Los datos utilizados para estimar estos índices incluyen precios y cantidades de 51 cultivos, de la mano de obra, de la tierra, del capital y de factores intermedios. El análisis revela que mientras los productos crecieron un 2,69% anual, el uso de factores de producción bajó un 0,09%; por lo tanto, la PTF creció a una tasa promedio anual del 2,78% entre 1961 y 1996. Se realizó además un análisis para siete períodos correspondientes a diferentes regímenes políticos. La PTF creció a un promedio anual de 1,83% con Alessandri (1961-64), 3,12%... |
| Tipo: Journal Article |
Palavras-chave: Total Factor Productivity; Törnqvist Index; Agriculture; Chile; Productivity Analysis; D24; O33. |
| Ano: 2004 |
URL: http://purl.umn.edu/28774 |
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| Mansson, Jonas. |
| Two types of guidelines can be obtained from a DEA (data envelopment analysis) analysis. Firstly, the firm can reduce input or increase production according to the DEA results. Secondly, an inefficient firm might be able to identify reference units. This makes it possible for the inefficient firm to, on site, study production that is more efficient, and thereby get information on e.g. efficient organisational solutions. In this study, we focus on how to detect these firm-relevant reference units. While applying the existing methods for identification of reference units, i.e. the intensity variable method and the dominance method, on a data set concerning booking centres in the Swedish taxi market, shortcomings in these methods were identified. This... |
| Tipo: Journal Article |
Palavras-chave: Reference units; Firm-relevant; DEA; Research Methods/ Statistical Methods; D24; L25. |
| Ano: 2003 |
URL: http://purl.umn.edu/44072 |
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| Bruhn, Miriam; Karlan, Dean S.; Schoar, Antoinette. |
| We test whether managerial human capital has a first order effect on the performance and growth of small enterprises in emerging markets. In a randomized control trial in Puebla, Mexico, we randomly assigned 150 out of 432 small and medium size enterprises to receive subsidized consulting services, while the remaining 267 enterprises served as a control group that did not receive any subsidized training. Treatment enterprises were matched with one of nine local consulting firms and met with their consultants once a week for four hours over a one year period. Results from a follow-up survey, conducted after the intervention, show that the consulting services had a large impact on the performance of the enterprises in the treatment group: monthly sales went... |
| Tipo: Working Paper |
Palavras-chave: Enterprise growth; Entrepreneurship; Managerial capital; Labor and Human Capital; D21; D24; L20; M13; O12. |
| Ano: 2012 |
URL: http://purl.umn.edu/121675 |
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| Bignebat, Celine; Koc, A. Ali; Lemeilleur, Sylvaine. |
| A wide range of the empirical studies shows to what extend the rise of supermarkets in developing countries deeply transform domestic marketing channels. In particular, the exclusion of small producers from the so-called dynamic marketing channels (that is remunerative ones) is at stake. Based on original data collected in Turkey in 2007 at the producer and the wholesale market levels, we show that the intermediaries are decisive in order to understand the impact of downstream restructuring (supermarkets) on upstream decisions (producers). The results show first that producers are not aware of the final buyer of their produce, as intermediaries hinder the visibility of the marketing channel, their choice is restricted to that of the first intermediary.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Supermarkets; Small farmers; Fresh fruit and vegetables; Turkey; Agribusiness; Production Economics; Q13; L14; D24. |
| Ano: 2009 |
URL: http://purl.umn.edu/52856 |
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| Lence, Sergio H.. |
| A thought experiment is designed to investigate whether the structure of risk aversion (i.e., the changes in absolute or relative risk aversion associated with changes in wealth) can be estimated with reasonable precision from agricultural production data. Findings strongly suggest that typical production data are unlikely to allow identification of the structure of risk aversion. A flexible utility parameterization is found to slightly worsen technology parameter estimates. Results also indicate that even under a restricted utility specification, utility parameter estimates are biased. Further, their quality is much worse when shocks are not large or samples are small. |
| Tipo: Presentation |
Palavras-chave: Expected utility; Risk preferences; Production analysis; Risk attitudes; Production Economics; Risk and Uncertainty; C13; D24; D81; Q12. |
| Ano: 2008 |
URL: http://purl.umn.edu/119534 |
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| Fleming, Euan M.; Fleming, Pauline. |
| Fortunes in the agricultural sectors of four of the largest South Pacific countries are traced in recent decades by estimating the single factoral terms of trade index. The single factoral terms of trade are measured for agriculture in four Melanesian countries-Fiji, Papua New Guinea, Solomon Islands and Vanuatu-over the period, 1970 to 2002. This index provides a useful method to assess changes in returns to factors employed in agricultural production in these countries. Except in Solomon Islands, farmers experienced a deteriorating index, indicating that they have reaped progressively lower returns to their resources. In Solomon Islands, returns to resources are shown to have increased slightly. A sustained contribution by the agricultural sector to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Factoral terms of trade; Melanesia; Smallholders; Total factor productivity; International Development; D24; O12; O47; Q17. |
| Ano: 2006 |
URL: http://purl.umn.edu/25715 |
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| Stern, David I.. |
| Interfuel substitutability has been of longstanding interest to energy economists and policy makers. However, there has been no quantitative meta-analysis of this literature. This research report fills this gap by analysing a broad sample of studies of interfuel substitution in the industrial sector, manufacturing industry or sub-industries, and macro-economy of a variety of developed and developing economies. The primary study sample size has been included in the meta-regression to control for publication bias. At the industrial level, results for the shadow elasticities of substitution between coal, oil, gas, and electricity for forty-six primary studies show that, except for gas-electricity and coal-electricity, there are easy substitution... |
| Tipo: Report |
Palavras-chave: Meta-analysis; Energy; Substitution; Elasticity; Interfuel; Environmental Economics and Policy; Resource /Energy Economics and Policy; D24; Q40. |
| Ano: 2009 |
URL: http://purl.umn.edu/94882 |
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| Registros recuperados: 98 | |
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