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Modelos de fronteira estocástica: uma abordagem bayesiana; Stochastic frontier models: a bayesian approach

Cespedes, Juliana Garcia
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 24/07/2008 PT
Relevância na Pesquisa
66.64%
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 baseia-se em análises de fronteiras, onde a ineficiência é medida como a distância entre os pontos observados da variável resposta e a função de produção, custo ou lucro verdadeiras, dependendo do modelo assumido para descrever a variável resposta. Existe uma variedade de formas funcionais para essas funções e algumas vezes é difícil julgar qual delas deve ser escolhida, visto que a forma verdadeira é desconhecida e pode ser somente aproximada. Em geral, na literatura, dados de produção são analisados assumindo-se modelos multiplicativos que impõem a restrição de que a produção é estritamente positiva e utiliza-se a transformação logarítmica para linearizar o modelo. Considera-se que o logaritmo do produto dada a ineficiência técnica tem distribuição contínua, independentemente de os dados serem contínuos ou discretos. A tese divide-se em dois artigos: o primeiro utiliza a inferência bayesiana para estimar a eficiência econômica de firmas utilizando os modelos de fronteira estocástica de custo com forma funcional flexível Fourier...

Eficiência produtiva da indústria de transformação nas regiões brasileiras: uma análise de fronteiras estocásticas e cadeias espaciais de Markov; Productive efficiency of the manufacturing industry in the Brazilian regions: a stochastic frontier and spatial Markov chain analysis

Schettini, Daniela Carla Decaro
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 09/04/2010 PT
Relevância na Pesquisa
56.35%
Este trabalho investiga a eficiência produtiva dos setores industriais nas regiões brasileiras. Para isso, utiliza um painel de dados da Pesquisa Industrial Anual do IBGE para o período de 2000 a 2006, desagregado por mesorregiões, setores da indústria de transformação e por setores de intensidade tecnológica. São estimados modelos de fronteira de produção estocástica para obtenção das estimativas das eficiências produtivas regionais e setoriais. Esses indicadores de eficiência são então analisados com base na literatura de economia espacial e das Cadeias Espaciais de Markov, que visam investigar o efeito da boa e da má vizinhança. Os resultados indicam que as mesorregiões mais eficientes tendem a localizar-se na faixa litorânea do Brasil, mas, na medida em que tratamos de setores mais básicos da economia, há maior dispersão da alta eficiência pelo espaço brasileiro. Além disso, percebe-se um deslocamento, ao longo do tempo, de altos índices de eficiência para as mesorregiões do Centro-Oeste. Em relação à eficiência setorial, observou-se que, em geral, os setores menos intensivos em tecnologia são menos eficientes: constatou-se que o setor de Alta Intensidade Tecnológica é 11% mais eficiente do que o setor de Baixa Intensidade. Os resultados das análises da influência das economias espaciais sobre a eficiência produtiva indicam que a vizinhança afeta o desempenho competitivo da região...

Productivity of Nations: a Stochastic Frontier Approach to Tfp Decomposition

Pires, Jorge O.; Garcia, Fernando
Fonte: Fundação Getúlio Vargas Publicador: Fundação Getúlio Vargas
Relevância na Pesquisa
56.56%
This Paper Tackles the Problem of Aggregate Tfp Measurement Using Stochastic Frontier Analysis (Sfa). Data From Penn World Table 6.1 are Used to Estimate a World Production Frontier For a Sample of 75 Countries Over a Long Period (1950-2000) Taking Advantage of the Model Offered By Battese and Coelli (1992). We Also Apply the Decomposition of Tfp Suggested By Bauer (1990) and Kumbhakar (2000) to a Smaller Sample of 36 Countries Over the Period 1970-2000 in Order to Evaluate the Effects of Changes in Efficiency (Technical and Allocative), Scale Effects and Technical Change. This Allows Us to Analyze the Role of Productivity and Its Components in Economic Growth of Developed and Developing Nations in Addition to the Importance of Factor Accumulation. Although not Much Explored in the Study of Economic Growth, Frontier Techniques Seem to Be of Particular Interest For That Purpose Since the Separation of Efficiency Effects and Technical Change Has a Direct Interpretation in Terms of the Catch-Up Debate. The Estimated Technical Efficiency Scores Reveal the Efficiency of Nations in the Production of Non Tradable Goods Since the Gdp Series Used is Ppp-Adjusted. We Also Provide a Second Set of Efficiency Scores Corrected in Order to Reveal Efficiency in the Production of Tradable Goods and Rank Them. When Compared to the Rankings of Productivity Indexes Offered By Non-Frontier Studies of Hall and Jones (1996) and Islam (1995) Our Ranking Shows a Somewhat More Intuitive Order of Countries. Rankings of the Technical Change and Scale Effects Components of Tfp Change are Also Very Intuitive. We Also Show That Productivity is Responsible For Virtually All the Differences of Performance Between Developed and Developing Countries in Terms of Rates of Growth of Income Per Worker. More Important...

Land reform in NE Brazil: a stochastic frontier production efficiency evaluation

Magalhães, Marcelo Marques de; Souza Filho, Hildo Meirelles de; Sousa, Miguel Rocha de; Silveira, José Maria F. J. da; Buainain, Antônio Márcio
Fonte: Sociedade Brasileira de Economia e Sociologia Rural Publicador: Sociedade Brasileira de Economia e Sociologia Rural
Tipo: Artigo de Revista Científica Formato: 9-30
ENG
Relevância na Pesquisa
56.38%
O objetivo desse artigo é caracterizar as fontes da ineficiência técnica e alocativa em um conjunto de 308 beneficiários de um programa de reforma agrária de mercado, chamado Cédula da Terra;, distribuídos em cinco estados do Nordeste brasileiro. Estudos conduzidos por Buainain et al. (2002) mostraram existem poucas diferenças entre as características de beneficiários deste programa e dos programas tradicionais de reforma agrária por expropriação e que portanto, os resultados obtidos por este trabalho permitem visualizar as dificuldades enfrentadas pelos assentamentos no Brasil. Para medir eficiência, estimou-se uma função de produção potencial segundo a metodologia de Battese e Coelli (1995) e a partir disto, procurou-se explicar as razões da ineficiência (relativa) encontrada. Os resultados apontam para a existência de ineficiência técnica e alocativa que é identificada principalmente nas situações em que a presença de produção para consumo é elevada. Tratase de um resultado que revela a pouca maturidade da maioria dos lotes dos assentados do PCT e a dificuldade de superar as limitações impostas pela condição inicial de formação dos assentamentos de reforma agrária, principalmente na região nordeste do Brasil.; The aim of this paper is to address the sources of technical and allocative inefficiency from a cross section sample of 308 beneficiaries of a market assisted land reform program...

Measuring the differences in productivities of Nations : a stochastic frontier approach

Aguiar, Diana Isabel Ribeiro
Fonte: Universidade Católica Portuguesa Publicador: Universidade Católica Portuguesa
Tipo: Dissertação de Mestrado
Publicado em 07/03/2014 ENG
Relevância na Pesquisa
66.64%
It is broadly accepted that differences in efficiency and productivity growth greatly contribute to the enormous differences in income across countries. Inefficiency levels were estimated for a panel of 40 countries, 34 of which are OECD-members and the remaining 6 are emergent economies, for the period of 2001-2011, using a stochastic frontier model based on the Battese and Coelli (1995) time-varying inefficiency model. Environmental variables were found to have an important role in explaining differences in technical efficiencies across countries. In particular, a high contribution of the agricultural sector and of natural resources rents to the economy, impediments to free trade such as tariffs, a bad business environment, a high number of patents, a high level of government debt and the financial crisis contribute negatively to technical efficiency. On the other hand, a good health status and good institutions help countries to be located closer to the frontier. Afterwards, productivity growth was decomposed using the Kumbhakar and Lovell (2000) primal frontier approach. The results showed that differences in TFP growth between developed and developing countries are the main drivers of the differences in the growth rates of GDP per worker...

A new frontier approach to model the eco-efficiency in European countries

Robaina-Alves, Margarita; Moutinho, Victor; Macedo, Pedro
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
56.61%
This study aims to evaluate the resource and environment efficiency problem of European countries. We specify a new stochastic frontier model where Gross Domestic Product (GDP) is considered as the desirable output and Greenhouse Gases (GHG) emissions as the undesirable output. Capital, Labour, Fossil fuels and Renewable Energy consumption are regarded as inputs. GDP/GHG ratio is maximized given the values of the other four variables. The study is divided into two distinct periods: 2000-2004 and 2005-2011. This division is related to the implementation of the Kyoto Protocol in 2005, and will allow us to evaluate the difference between the levels of efficiency before and after the establishment of environmental targets. Since stochastic frontier models are typically ill-posed, a new maximum entropy approach to assess technical efficiency, which combines information from the data envelopment analysis and the structure of composed error from the stochastic frontier approach without requiring distributional assumptions, is presented in this work.

Joint Regression Analysis and Incorporation of Environmental Variables in Stochastic Frontier Production Function: An Application to Experimental Data of Winter Rye

Pereira, D. G.; Sampaio, Ana
Fonte: Springer Berlin Heidelberg Publicador: Springer Berlin Heidelberg
Tipo: Parte de Livro
ENG
Relevância na Pesquisa
66.56%
This chapter joins the main properties of two specific regression techniques, joint-regression analysis (JRA) and stochastic frontier approach (SFA) in the analysis of experimental data sets from a breeding program of winter rye (Secale cereale L.), conducted in Poland, Research Center for Cultivar Testing de Słupia Wielka, over the period 1997–1998. With JRA, a meta-model, based on several linear regressions, had been estimated in order to analyze multilocation trials of winter rye production and to select the best cultivars (more productive) for a related stratum (locality/genotype). With SFA, another regression model had been investigated to predict production rankings of cultivars, through individual efficiency estimates. These measures resulted from a stochastic production frontier on experimental data of production and different climate conditions. Both techniques show similar dominant cultivars for the same environments.

O Sistema Bancário Português: Eficiência e outras propostas de valor

Silva, Catarina Pita de Vasconcelos Coelho da
Fonte: Instituto Superior de Economia e Gestão Publicador: Instituto Superior de Economia e Gestão
Tipo: Dissertação de Mestrado
Publicado em 22/09/2010 POR
Relevância na Pesquisa
46.56%
Mestrado em Ciências Económicas; O Sistema Bancário Português (SBP) tem evoluído ao longo dos últimos vinte anos, não só ao nível do desempenho financeiro e do número de instituições bancárias que o compõe, como ao nível, dos objectivos económicos que pautam os gestores destas empresas. O aumento da concorrência e a globalização estão na base da procura de melhores práticas de mercado e na crescente procura da produtividade e da eficiência das instituições. A utilização do método paramétrico, Stochastic Frontier Analysis (SFA), permitiu estudar a eficiência de vinte e quatro Instituições Financeiras (IF), que operaram em Portugal entre 2000 e 2008. Assume-se como premissa que a eficiência do SBP é dada por factores empresariais, nomeadamente pelo Resultado Líquido das Instituições e não se adopta a Teoria da Intermediação dos Mercados Financeiros. Conclui-se que o total do activo, os recursos captados, o crédito concedido e rácio custos sobre o produto bancário (ou, cost to income), permitem explicar a eficiência técnica do SBP, com nível de significância de 95%. A eficiência técnica ronda os 70%, aumentando apenas quando introduzido o efeito conjunto entre o total do activo e o volume de crédito concedido...

Bayesian estimation of inefficiency heterogeneity in stochastic frontier models

Galán, J. E.; Veiga, H.; Wiper, M. P.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em //2014 ENG
Relevância na Pesquisa
66.45%
Estimation of the one sided error component in stochastic frontier models may erroneously attribute firm characteristics to inefficiency if heterogeneity is unaccounted for. However, unobserved inefficiency heterogeneity has been little explored. In this work, we propose to capture it through a random parameter which may affect the location, scale, or both parameters of a truncated normal inefficiency distribution using a Bayesian approach. Our findings using two real data sets, suggest that the inclusion of a random parameter in the inefficiency distribution is able to capture latent heterogeneity and can be used to validate the suitability of observed covariates to distinguish heterogeneity from inefficiency. Relevant effects are also found on separating and shrinking individual posterior efficiency distributions when heterogeneity affects the location and scale parameters of the one-sided error distribution, and consequently affecting the estimated mean efficiency scores and rankings. In particular, including heterogeneity simultaneously in both parameters of the inefficiency distribution in models that satisfy the scaling property leads to a decrease in the uncertainty around the mean scores and less overlapping of the posterior efficiency distributions...

Benchmarking in primary health care: An application of the stochasticd frontier analysis and the grades of membership approach to Portuguese family health units

Neves, Ana Catarina Arranhado
Fonte: NSBE - UNL Publicador: NSBE - UNL
Tipo: Dissertação de Mestrado
Publicado em /06/2011 ENG
Relevância na Pesquisa
56.38%
A Work Project, presented as part of the requirements for the Award of a Masters Degree in Economics from the NOVA – School of Business and Economics; This work aims at assessing the Portuguese family health units, whose creation was part of the primary health care reform that began in 2005, in terms of their performance. Family health units are ranked with regard to cost efficiency – stochastic frontier analysis is the econometric technique followed – and the establishment of extreme profiles they compare to is determined through the grades of membership approach. The definition of specific goals for each family health unit to achieve in terms of performance are delivered as the final output of this work, which should allow for improvement of efficiency levels.

Land reform in NE Brazil: a stochastic frontier production efficiency evaluation

Magalhães,Marcelo Marques de; Souza Filho,Hildo Meirelles de; Sousa,Miguel Rocha de; Silveira,José Maria F. J. da; Buainain,Antônio Márcio
Fonte: Sociedade Brasileira de Economia e Sociologia Rural Publicador: Sociedade Brasileira de Economia e Sociologia Rural
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2011 EN
Relevância na Pesquisa
56.38%
The aim of this paper is to address the sources of technical and allocative inefficiency from a cross section sample of 308 beneficiaries of a market assisted land reform program, called "Cédula da Terra"; from five states in Northeastern region of Brazil. In spite of some differences on governance of the "Cédula da Terra"; in comparison with traditional expropriation land reform program, studies carried by Buainain et al. (2002) have shown small differences between then, regarding their social and economic characteristics. We believe that our results could be useful to identify the main problems of Brazilian land reform settlements. We estimated a potential production frontier following the methodology of Battese and Coelli (1995), Coelli et al. (1998) and applied econometric techniques to explain inefficiency. The results indicate the existence of technical and allocative inefficiency, which is identified mostly in situations where the presence of production for consumption is high. This is a result that shows how immature the agriculture activity is in most of Cédula da Terra Program settlements and the difficulty to overcome the limitations imposed by the initial condition of formation of agrarian reform, primarily in Northeastern region of Brazil.

Fronteira de produção e eficiência econômica da cafeicultura mineira; Frontier production and economic efficiency of coffee of Minas Gerais

Fonte: Organizações Rurais e Agroindustriais Publicador: Organizações Rurais e Agroindustriais
Tipo: Artigo de Revista Científica
OTHER
Relevância na Pesquisa
56.52%
This study has investigated the levels of economic efficiency of the productive resources of Minas Gerais coffee, identifying variations in the generation of obtained results through parametric and nonparametric methods. The data employed were the following: a) inventory of land, improvements, machinery, equipment, vehicles, implementation value of coffee plantations and further items of infrastructure of properties; b) technical indexes such as production and productivity; c) survey of components of fixed and variable costs: input and service costs. The data refer to agricultural years 2007/2008 and 2008/2009 which were adjusted for 2008/2009 season through agricultural price indicators and FGV IGP-DI. To analyze the management of productive resources, indicators of interest are technical allocative and economic efficiencies. As an analytical model we have used the Data Envelopment Analysis (DEA) - which is to find the best virtual company from a group of companies of a sample - and Stochastic Frontier - which is the assessment of mathematical functions according to reality series data, imposing a functional form to explain the levels of business efficiency. As a result it can be stated that DEA and stochastic frontier methodologies did not suggest different results to separate the coffee farmers for their economic efficiencies.

FINITE SAMPLE EVIDENCE ON THE PERFORMANCE OF STOCHASTIC FRONTIER AND DATA ENVELOPMENT MODELS IN THE ESTIMATION OF FIRM-SPECIFIC TECHNICAL EFFICIENCY USING PANEL DATA

GONG, BYEONG-HO
Fonte: Universidade Rice Publicador: Universidade Rice
ENG
Relevância na Pesquisa
46.84%
In recent years a number of alternative methods have been proposed with which to measure technical efficiency. But we know little of their comparative performance in efficiency measurement. In this study we examine the relative strengths of two different methods--stochastic frontier models using three flexible forms and Data Envelopment Analysis (DEA) in the estimation of firm-specific technical efficiency. To address the limitations of previous studies we utilize Monte Carlo techniques which allow us to control the structure of an underlying technology and two stochastic components. Most stochastic frontier models have focused on estimating average technical efficiency across all firms. The failure to estimate firm-specific technical efficiency has been regarded as a major limitation of previous stochastic frontier models. To overcome this limitation we estimate firm-specific technical efficiency using panel data. We also examine the performance of stochastic frontier models using panel data for three estimators--MLE, GLS and the Within estimator. Our results indicate that for simple underlying technologies the relative superiority of the stochastic frontier models to DEA depends on the choice of functional forms. That is, if the employed form is close to the given underlying technology...

Bayesian estimation of inefficiency heterogeneity in stochastic frontier models

Galán, Jorge E.; Veiga, Helena; Wiper, Michael P.
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: info:eu-repo/semantics/draft; info:eu-repo/semantics/workingPaper Formato: application/pdf
Publicado em /05/2012 ENG
Relevância na Pesquisa
66.56%
Estimation of the one sided error component in stochastic frontier models may erroneously attribute firm characteristics to inefficiency if heterogeneity is unaccounted for. However, it is not clear in general in which component of the error distribution the covariates should be included. In the classical context, some studies include covariates in the scale parameter of the inefficiency with the property of preserving the shape of its distribution. We extend this idea to Bayesian inference for stochastic frontier models capturing both observed and unobserved heterogeneity under half normal, truncated and exponential distributed inefficiencies. We use the WinBugs package to implement our approach throughout. Our findings using two real data sets, illustrate the relevant effects on shrinking and separating individual posterior efficiencies when heterogeneity affects the scale of the inefficiency. We also see that the inclusion of unobserved heterogeneity is still relevant when no observable covariates are available.; inancial support from the Spanish Ministry of Education and Science, research projects ECO2009-08100, MTM2010-17323 and SEJ2007-64500 is also gratefully acknowledged.

Heterogeneous effects of risk-taking on bank efficiency : a stochastic frontier model with random coefficients

Sarmiento, Miguel; Galán, Jorge E.
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: info:eu-repo/semantics/draft; info:eu-repo/semantics/workingPaper
Publicado em /07/2014 ENG
Relevância na Pesquisa
66.45%
We estimate a stochastic frontier model with random inefficiency parameters, which allows us not only to identify the role of bank risk-taking on driving cost and profit inefficiency, but also to recognize heterogeneous effects of risk exposure on banks with different characteristics. We account for an integral group of risk exposure covariates including credit, liquidity, capital and market risk, as well as bank-specific characteristics of size and affiliation. The model is estimated for the Colombian banking sector during the period 2002-2012. Results suggest that risk-taking drives inefficiency and its omission leads to over (under) estimate cost (profit) efficiency. Risk-taking is also found to have different effects on efficiency of banks with different size and affiliation, and those involved in mergers and acquisitions. In particular, greater exposures to credit and market risk are found to be key profit efficiency drivers.Likewise, lower liquidity risk and capital risk lead to higher efficiency in both costs and profits. Large, foreign and merged banks benefit more when assuming credit risk, while small, domestic and non-merged banks institutions take advantage of assuming higher market risk; Jorge E. Galán acknowledges financial support from the Spanish Ministry of Education and Science...

Benchmarking Container Port Technical Efficiency in Latin America and the Caribbean : A Stochastic Frontier Analysis

Morales Sarriera, Javier; Araya, Gonzalo; Serebrisky, Tomas; Briceño-Garmendía, Cecilia; Schwartz, Jordan
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Policy Research Working Paper; Publications & Research
ENGLISH; EN_US
Relevância na Pesquisa
56.45%
This paper presents a technical efficiency analysis of container ports in Latin America and the Caribbean using an input-oriented stochastic frontier model. A 10-year panel is employed with data on container throughput, port terminal area, length of berths, and number of cranes available in 67 ports. The model has three innovations with respect to the available literature: (i) it treats ship-to-shore gantry cranes and mobile cranes separately, in order to account for the higher productivity of the former; (ii) a binary variable is introduced for ports using ships' cranes, treated as an additional source of port productivity; and (iii) a binary variable is used for ports operating as transshipment hubs. The associated parameters are highly significant in the production function. The results show an improvement in the average technical efficiency of ports in the Latin America and the Caribbean region from 36 percent to 50 percent between 1999 and 2009; the best-performing port in 2009 achieved a technical efficiency of 94 percent with respect to the frontier. The paper also studies possible determinants of port technical efficiency...

Economic and environmental efficiency in Europe: evidence from a new stochastic frontier model

Alves, Margarita; Moutinho, Vítor; Macedo, Pedro
Fonte: IEEE Publicador: IEEE
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
66.45%
This study aims to evaluate the resource and environment efficiency problem of European countries. We specify a new stochastic frontier model where Gross Domestic Product (GDP) is considered as the desirable output and Greenhouse Gases (GHG) emissions as the undesirable output. Capital, Labour, Fossil fuels and Renewable Energy consumption are regarded as inputs. The study is divided into two distinct periods, 2000-2004 and 2005-2011, in order to evaluate the difference between efficiency levels before and after the establishment of environmental targets related with the implementation of the Kyoto Protocol in 2005. A maximum entropy approach to assess technical efficiency is discussed.

Measurement of the technical efficiency of small pineapple farmers in Santander, Colombia: a stochastic frontier approach

Trujillo,Juan C.; Iglesias,Wilman J.
Fonte: Sociedade Brasileira de Economia e Sociologia Rural Publicador: Sociedade Brasileira de Economia e Sociologia Rural
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2013 EN
Relevância na Pesquisa
66.56%
The objective of this study is to estimate the levels of technical efficiency of the small pineapple farmers of Santander, Colombia, using the stochastic frontier approach. In addition, this study attempts to determine whether the acreage and some of the socio-economic characteristics of farmers can influence the efficiency of their pineapple farms. By exploiting the information that was gathered in a survey of 194 pineapple farmers in the region, these farmers' technical efficiency was estimated using a Cobb-Douglas-type stochastic frontier model and a technical inefficiency model. The results suggest that acreage and the variables that are associated with the human capital, e.g., the level of schooling and the years of experience in agricultural activity, explain the levels of technical efficiency to a significant degree.

Estimating the relative efficiency of Brazilian publicly and privately owned water utilities: a stochastic cost frontier approach

Souza, Geraldo da Silva e; Faria, Ricardo Coelho de; Moreira, Tito Belchior S.
Fonte: Universidade Católica de Brasília Publicador: Universidade Católica de Brasília
Tipo: Artigo de Revista Científica Formato: Texto
EN_US
Relevância na Pesquisa
56.45%
This paper assesses cost efficiencies of Brazilian public and private companies of water supply. To measure the efficiency, we used a stochastic frontier model derived from the translog family – a specification similar to a Cobb-Douglas including a quadratic term in log output. The model parameters are estimated by maximum likelihood using Brazilian data for the year 2002. Statistical inference leads to the conclusion that there is no evidence that private firms and public firms are significantly different in terms of efficiency measurements.

Technical efficiency of thermal power units through a stochastic frontier

Marmolejo-Saucedo,José Antonio; Rodríguez-Aguilar,Román; Cedillo-Campos,Miguel Gastón; Salazar-Martínez,María Soledad
Fonte: DYNA Publicador: DYNA
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 EN
Relevância na Pesquisa
66.64%
This work presents a model to obtain a stochastic frontier production function of a Mexican power generation company. The stochastic frontier allows us to evaluate the technical efficiency of an energy producer according of the level of inputs. Electricity generation based on thermal generation is highly expensive due to operational inefficiency of thermal power plants. At the moment, in Mexico, technical efficiency of thermal power units has not been studied for the national electricity system. Therefore, in order to know the productivity levels of thermal generation, an empirical application of the stochastic frontier model is obtained using a panel data of thermoelectric units from the Mexican electricity system for the 2009-2013 period.