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Author(s): Vera L. Miguéis
A. S. Camanho
E. Bjørndal
M. Bjørndal
Title: Productivity change and innovation in Norwegian electricity distribution companies
Issue Date: 2012
Abstract: Regulators of electricity distribution networks have typically applied Data Envelopment Analysis(DEA) to cross-section data for benchmarking purposes. However, the use of panel data to analysethe impact of regulatory policies on productivity change over time is less frequent. The main purpose ofthis paper is to construct a Malmquist productivity index to examine the recent productivity changeexperienced by Norwegian distribution companies between 2004 and 2007. The Malmquist index isdecomposed in order to explore the sources of productivity change, and to identify the innovatorcompanies that pushed the frontier forward each year. The input and output variables consideredare those used by the Norwegian regulator. In order to reflect appropriately the exogenous conditionswhere the companies operate, the efficiency model used in this paper incorporates geography variablesas outputs of the DEA model. Unlike the model used by the regulator, we included virtual weightrestrictions in the DEA formulation to correct the biases in the DEA results that may be associated toa judicious choice of weights by some of the companies.
Subject: Estudos de gestão, Outras ciências da engenharia e tecnologias
Management studies, Other engineering and technologies
Scientific areas: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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