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Productivity change and innovation in Norwegian electricity distribution companies / V. L. Miguéis in Journal of the operational research society (JORS), Vol. 63 N° 7 (Juillet 2012) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 63 N° 7 (Juillet 2012) . - pp. 982–990 Titre : Productivity change and innovation in Norwegian electricity distribution companies Type de document : texte imprimé Auteurs : V. L. Miguéis, Auteur ; A. S. Camanho, Auteur ; E. Bjørndal, Auteur ; M. Bjørndal, Auteur Année de publication : 2012 Article en page(s) : pp. 982–990 Note générale : Operational research Langues : Anglais (eng) Mots-clés : Data  envelopment  analysis  Regulation  Electricity  distribution  Malmquist  index  Virtual  weight  restrictions Index. décimale : 001.424 Résumé : 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 analyse the impact of regulatory policies on productivity change over time is less frequent. The main purpose of this paper is to construct a Malmquist productivity index to examine the recent productivity change experienced by Norwegian distribution companies between 2004 and 2007. The Malmquist index is decomposed in order to explore the sources of productivity change, and to identify the innovator companies that pushed the frontier forward each year. The input and output variables considered are those used by the Norwegian regulator. In order to reflect appropriately the exogenous conditions where the companies operate, the efficiency model used in this paper incorporates geography variables as outputs of the DEA model. Unlike the model used by the regulator, we included virtual weight restrictions in the DEA formulation to correct the biases in the DEA results that may be associated to a judicious choice of weights by some of the companies. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n7/abs/jors201182a.html [article] Productivity change and innovation in Norwegian electricity distribution companies [texte imprimé] / V. L. Miguéis, Auteur ; A. S. Camanho, Auteur ; E. Bjørndal, Auteur ; M. Bjørndal, Auteur . - 2012 . - pp. 982–990. Operational research Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 63 N° 7 (Juillet 2012) . - pp. 982–990 Mots-clés : Data  envelopment  analysis  Regulation  Electricity  distribution  Malmquist  index  Virtual  weight  restrictions Index. décimale : 001.424 Résumé : 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 analyse the impact of regulatory policies on productivity change over time is less frequent. The main purpose of this paper is to construct a Malmquist productivity index to examine the recent productivity change experienced by Norwegian distribution companies between 2004 and 2007. The Malmquist index is decomposed in order to explore the sources of productivity change, and to identify the innovator companies that pushed the frontier forward each year. The input and output variables considered are those used by the Norwegian regulator. In order to reflect appropriately the exogenous conditions where the companies operate, the efficiency model used in this paper incorporates geography variables as outputs of the DEA model. Unlike the model used by the regulator, we included virtual weight restrictions in the DEA formulation to correct the biases in the DEA results that may be associated to a judicious choice of weights by some of the companies. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n7/abs/jors201182a.html