SciELO - Scientific Electronic Library Online

 
vol.26 número1Fronteira DEA difusa na avaliação de eficiência em agriculturaAn integer programming model for truss topology optimization índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Investigação Operacional

versión impresa ISSN 0874-5161

Resumen

MARQUES, Rui Cunha  y  SILVA, Duarte. Statistical inference of efficiency estimators obtained with the DEA nonparametric frontier technique: A Bootstrap methodology. Inv. Op. [online]. 2006, vol.26, n.1, pp.89-110. ISSN 0874-5161.

The efficiency measurement of decision making units is a key-task in contemporary societies. Despite the existence of several methodologies with this aim none of them is clearly superior. One of the most used is the non-parametric technique of data envelopment analysis (DEA). The DEA method has many advantages, therefore, being very popular and widely adopted. However, it doesn’t allow for the results statistical inference, which can constrain its use. This document provides some insights for that debate, discussing and applying the DEA technique to 70 water services in Portugal. Later, a re-sampling (bootstrap) methodology is applied to the results attained by DEA, enabling its statistical inference. The quality of the values obtained by the bootstrap depends much on the average efficiency level and on its dispersion. That is, if the average inefficiency gap and its dispersion are considerable, the results will be far from the ones wished. Nevertheless, under the opposite circumstances, the results are interesting and satisfactory, surpassing the traditional drawbacks pointed at DEA. 

Palabras clave : Efficiency; DEA; Statistical Inference; Bootstrap; Water Services.

        · resumen en Portugués     · texto en Portugués     · Portugués ( pdf )