Stochastic Cost Frontier
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. THE EM ALGORITHM FOR STANDARD STOCHASTIC FRONTIER MODELS
ABSTRACT The Expectation-Maximization (EM) algorithm is developed for the stochastic frontier models most used in practice with cross-section data. The resulting algorithms can be easily programmed into a computer and are shown to be worthy alternatives to general-purpose optimization routines currently used. The algorithms for the half normal and the expone
Pesqui. Oper.. Publicado em: 02/12/2019
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2. Main factors that affect the economic efficiency of broiler breeder production
This study aimed at identifying the factors that affect the economic efficiency of broiler breeder production using the analysis of stochastic profit frontier function. Data were collected in 48 broiler breeder farms contracted by a commercial company located in southwestern Paraná, Brazil. The collected data refer to the last batch of fertile eggs that was
Rev. Bras. Cienc. Avic.. Publicado em: 2015-03
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3. Medidas de custo-eficiência nos serviços subnacionais de segurança pública : uma abordagem com o uso de fronteiras estocásticas
This paper measures the efficiency of the subnational public security system estimating a stochastic cost frontier from a panel data (2001 to 2006). The given method innovates Brazilian economic public security research, focused primarily on determinants of murder rates, when comparing the deviations from efficiency frontier of the twenty-seven units of the
Publicado em: 2008
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4. UMA ABORDAGEM BAYESIANA PARA O CÁLCULO DOS CUSTOS OPERACIONAIS EFICIENTES DAS DISTRIBUIDORAS DE ENERGIA ELÉTRICA / A BAYESIAN APPROACH TO ESTIMATE THE EFFICIENT OPERATIONAL COSTS OF ELECTRICAL ENERGY UTILITIES
This thesis presents the main results of the cost efficiency scores of 60 Brazilian electricity distribution utilities. Based on yardstick competition scheme, it was applied a Kohonen Neural Networks (KNN) to identify and to group the similar utilities. The KNN results are not deterministic, since the estimated weights are randomly initialized. Thus, a Monte
Publicado em: 2008
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5. Modelos de fronteira estocástica: uma abordagem bayesiana / Stochastic frontier models: a bayesian approach
A firma é o principal agente econômico para a produção e distribuição de bens e serviços. Seu constante investimento em melhorias e o aperfeiçoamento de sua capacidade produtiva, visando tornar-se cada vez mais eficiente, transforma-se em um determinante central do bem estar econômico da sociedade. O processo de medir a ineficiência de firmas basei
Publicado em: 2008
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6. Fronteiras Paramétricas de Eficiência para o Segmento de Transmissão de Energia Elétrica no Brasil
It analyses the cost efficiency of Brazilian electricity transmission companies by means of the stochastic frontier analysis in order to contribute for the development of an impartial and fair methodology to be applied by the Brazilian Electricity Regulatory Agency - ANEEL, as a regulation for incentive policy in the transmission industry. It develops a meth
Publicado em: 2006
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7. Mensurando a eficiência no sistema judiciário: métodos paramétricos e não-paramétricos
The purpose of this study is to assess the efficiency of the Brazilian Judicial System using parametric and nonparametric methodologies, which allows the construction of a benchmark to compare the performance between the Jurisdictions and/or Courts. The efficiency is one of Constitutional requirements for Public Administration (article 37 of Federal Constitu
Publicado em: 2006
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8. A mensuração do produto, eficiência e economias de escala dos bancos brasileiros / Measuring output, efficiency and economies of scale in the Brazilian banking sector
This work applies the Wang (2003a, 2003b) methodology to define Brazilian banksoutput. It is believed that this new output measure is superior to the ones commonly used by the literature, since it treats output as a flow variable, provides a theoretical basis for defining the role of deposits and takes account of risk exposure in defining output. This new me
Publicado em: 2006
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9. Fronteira de eficiência em serviços de saneamento no estado de São Paulo. / Eficiency frontier of sanitation service in State of São Paulo.
By the fact that the inter-relationship between health, sanitation, environmental conservation and economic growth, are essential for the systematical basic sanitary planning, programs that are focused on basic sanitation are considered to be as a mitigation mechanism to avoid diseases and epidemics spread by water bodies. However, in literature there is wel
Publicado em: 2005
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10. Eficiência de produção: um enfoque Bayesiano. / Production efficiency: a bayesian approach.
The use of stochastic production frontier with multiple-outputs has been waking up a special interest in areas of the economy that are confronted with the problem of quantifying the technical efficiency of firms. In the classic statistics, when it is confronted with firms that possess several outputs, cost or profit functions are more used to calculate that
Publicado em: 2004
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11. Evaluation of methods parametric and non parametric in the analysis of the efficiency of the milk production. / Avaliação de métodos paramétricos e não paramétricos na análise da eficiência da produção de leite.
The objective of the study is test the most applied methods in the analysis of the relative efficiency, purposing the comparation between a producer and a group of resembled producers, or a producer with the entire sample, as the stochastic frontiers (random border) case. The tested methods were the DEA (Data Envelopment Analysis), the stochastic frontier
Publicado em: 2003
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12. Measuring hospital efficiency: a comparison of two approaches.
OBJECTIVE: To compare the results of scoring hospital efficiency by means of two new types of frontier models, Data Envelopment Analysis (DEA) and stochastic frontier regression (SFR). STUDY SETTING: Financial records of Florida acute care hospitals in continuous operation over the period 1982-1993. STUDY DESIGN: Comparable DEA and SFR models are specified,