A Statistical Test for Nested Radial Dea Models

Pastor, Jesús T.; Ruiz, José L.; Sirvent, Inmaculada

doi:10.1287/opre.50.4.728.2866

Cited by 136 publications

(101 citation statements)

References 23 publications

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“…In addition, we follow prior simulation studies on frontier models and assume that the noise term has a standard normal distribution and the inefficiency term a half-normal distribution (Pastor et al 2002;Coelli 2005 situation, we want our experiment to include a moderate measurement error. In our experiment, the ratio between the variances of simulated inefficiency and the noise distributions is equal to 5.13, which, according to Banker and Natarajan (2009), corresponds to a situation with moderate measurement errors.…”

Section: Parametersmentioning

confidence: 99%

Measuring Eco-Inefficiency: A New Frontier Approach

Chen

Delmas

2012

Operations Research

146

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Increasing social concerns over the environmental externalities associated with business activities are pushing firms to identify activities that create economic value with less environmental impact and to become more eco-efficient. Over the past two decades, researchers have increasingly used frontier efficiency models to evaluate productive efficiency in the presence of undesirable outputs, such as greenhouse gas emissions. In this paper, we identify critical flaws of existing frontier models and show that under these models eco-inefficient firms can be identified as eco-efficient. We develop a new ecoinefficiency frontier model that rectifies these problems. Our model allows us to calculate, for each firm, an eco-inefficiency score and improvements in outputs necessary to attain eco-efficiency. We demonstrate, through a Monte-Carlo experiment that our eco-inefficiency model provides a more reliable measurement of corporate eco-inefficiency than the existing frontier models. In the simulation experiment we develop a production function of multiple desirable and undesirable outputs that extends the classical Cob-Douglas function of a single output. The multi-output production function allows for greater flexibility in the simulation analysis of frontier models.

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Section: Parametersmentioning

confidence: 99%

Measuring Eco-Inefficiency: A New Frontier Approach

Chen

Delmas

2012

Operations Research

146

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“…Specification search methods in DEA have been proposed by Norman and Stocker (1991), Pastor et al (2002) …”

Section: Dea Efficiency and Financial Institutionsmentioning

confidence: 99%

Microfinance institutions and efficiency

Nieto¹,

Serrano‐Cinca²,

Molinero³

2007

Omega

255

158

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Microfinance Institutions (MFIs) are special financial institutions. They have both a social nature and a for-profit nature. Their performance has been traditionally measured by means of financial ratios. The paper uses a Data Envelopment Analysis (DEA) approach to efficiency to show that ratio analysis does not capture DEA efficiency.Special care is taken in the specification of the DEA model. We take a methodological approach based on multivariate analysis. We rank DEA efficiencies under different models and specifications; e.g., particular sets of inputs and outputs. This serves to explore what is behind a DEA score.The results show that we can explain MFIs efficiency by means of four principal components of efficiency, and this way we are able to understand differences between DEA scores. It is shown that there are country effects on efficiency; and effects that depend on Non-governmental Organization (NGO)/non-NGO status of the MFI.

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“…De acuerdo a [8], la metodología del DEA presenta algunas desventajas, las cuales deben tenerse en cuenta al analizar los resultados de los modelos calculados.…”

Section: Consecuencias Teóricasunclassified

Eficiencia técnica en las empresas de distribución eléctrica de la Corporación FONAFE

Anccasi

2016

Ing.

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Technical efficiency in electricity distribution companies of FONAFE CorporationPalabras clave: Eficiencia técnica; distribución eléctrica, Fronteras de eficiencia; análisis envolvente de datos (DEA).Keywords: Technical efficiency; electrical distribution, borders efficiency; data envelopment analysis (DEA).Resumen--En el Perú, la distribución eléctrica es una actividad regulada con características de monopolio natural, donde el concepto de empresa eficiente se define como una empresa que se encuentra adaptada a la demanda y que opera bajo un plan de obras óptimo.En este esquema, para forzar a las empresas a ser eficientes, el regulador fija precios de acuerdo a los costos de una empresa eficiente, diseñada desde cero y sin considerar a las empresas reales. La evidente necesidad de revisar los procedimientos que se siguen para determinar la empresa eficiente, considerando las características de la distribución eléctrica y su influencia en la frontera de eficiencia, desde el punto de vista del criterio de la eficiencia productiva, ha llevado a proponer la metodología Análisis Envolvente de Datos (DEA).El DEA permitió la determinación de eficiencia para el grupo de empresas de distribución eléctricas de la corporación Fondo Nacional de Financiamiento de la Actividad Empresarial del Estado (FONAFE) e identificar un conjunto de indicadores relativos a la eficiencia del proceso productivo de las empresas. Las propiedades de la técnica DEA permitieron considerar conjuntamente variables con distintas dimensiones físicas que caracterizan la actividad de distribución en un análisis global del sector y, al mismo tiempo, contemplar características propias de cada empresa de distribución respecto a su entorno.Para la investigación se utilizó el método científico, tipo de investigación básico, nivel de investigación explicativa, diseño de investigación transeccionales correlacionales-causales. La población de estudio está centrada en las empresas de la corporación FONAFE y para validar la hipótesis se realizó la regresión logística.Del análisis se observa que sólo el 57 % de las empresas evaluadas alcanzó la calificación de técnicamente eficientes y para cada una de las otras empresas, la metodología identificó acciones y estrategias para mejoras de la productividad.Abstract-In Peru, the electrical distribution is an activity regulated with natural monopoly characteristics, where the concept of efficient company, is defined as a company that is adapted to demand and which operates under an optimal plan of works. In this scheme, to force companies to be efficient, the regulator sets prices according to the costs of an efficient enterprise, designed from scratch and without regard to the actual companies.The evident necessity of reviewing the procedures that are followed to determine the efficient enterprise, considering the characteristics of the electrical distribution and its influence on the border of efficiency from the point of view of the criteria of productive efficiency, has led to propose the methodology data envelop...

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A Statistical Test for Nested Radial Dea Models

Cited by 136 publications

References 23 publications

Measuring Eco-Inefficiency: A New Frontier Approach

Measuring Eco-Inefficiency: A New Frontier Approach

Microfinance institutions and efficiency

Eficiencia técnica en las empresas de distribución eléctrica de la Corporación FONAFE

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