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Extending the use of super-efficiency under undesirable outputs: An application to energy efficiency in the European Union

Listed author(s):
  • Roberto Gómez-Calvet


    (Business Department, European University of Valencia, Valencia, Spain)

  • David Conesa


    (Statistics and Operational Research Department, Universitat de València, Valencia, Spain)

  • Ana Rosa Gómez-Calvet


    (Business Finance Department, Universitat de Valè ncia, Valencia, Spain)

  • Emili Tortosa-Ausina


    (IVIE and Department of Economics, Universitat Jaume I, Castellón, Spain)

Data Envelopment Analysis (DEA) models have been intensively used for measuring efficiency in a variety of contexts. More recently, the inclusion of undesirable outputs has extended their use to analyze relevant fields such as environmental efficiency. In this context, Slacks-Based Measure (SBM) models offer a remarkable alternative, largely due to their ability to deal with undesirable outputs. Additionally, super-efficiency evaluation in DEA is a useful complementary analysis for ranking the performance of efficient DMUs. Although the literature has already considered a pioneering proposal for dealing with super-efficiency in SBM models, which may be referred to as Super-SBM, we extend this approach to the presence of undesirable outputs. We illustrate this contribution in three scenarios where super-efficiency SBM models with undesirable outputs may be of interest: (i) the analysis of productivity change; (ii) the provision of a full ranking of efficiency (also including efficient units); and (iii) the detection of influential units. Finally, we present and discuss an empirical application dealing with environmental efficiency in electricity and derived heat generation in the European Union.

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Paper provided by Economics Department, Universitat Jaume I, Castellón (Spain) in its series Working Papers with number 2014/03.

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Length: 22 pages
Date of creation: 2014
Handle: RePEc:jau:wpaper:2014/03
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