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Economic efficiency when prices are not fixed: disentangling quantity and price efficiency

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  • Portela, Maria Conceição A. Silva
  • Thanassoulis, Emmanuel

Abstract

This paper proposes an approach to compute cost efficiency in contexts where units can adjust input quantities and to some degree prices so that through their joint determination they can minimise the aggregate cost of the outputs they secure. The model developed is based on the data envelopment analysis (DEA) framework and can accommodate situations where the degree of influence over prices ranges from minimal to considerable. When units cannot influence prices at all the model proposed reduces to the standard cost efficiency DEA model for the case where prices are taken as exogenous. In addition to the cost efficiency model, we introduce an additive decomposition of potential cost savings into a quantity and a price component, based on Bennet indicators.

Suggested Citation

  • Portela, Maria Conceição A. Silva & Thanassoulis, Emmanuel, 2014. "Economic efficiency when prices are not fixed: disentangling quantity and price efficiency," Omega, Elsevier, vol. 47(C), pages 36-44.
  • Handle: RePEc:eee:jomega:v:47:y:2014:i:c:p:36-44
    DOI: 10.1016/j.omega.2014.03.005
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    References listed on IDEAS

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    Cited by:

    1. repec:eee:ejores:v:264:y:2018:i:2:p:742-755 is not listed on IDEAS
    2. Emili Tortosa-Ausina & Diego Prior Jiménez, 2014. "Earnings quality and performance in the banking industry: A profit frontier approach," Working Papers 1405, Departament Empresa, Universitat Autònoma de Barcelona, revised Nov 2014.
    3. Silva Portela, Maria Conceição A., 2014. "Value and quantity data in economic and technical efficiency measurement," Economics Letters, Elsevier, vol. 124(1), pages 108-112.
    4. Thanassoulis, Emmanuel & Shiraz, Rashed Khanjani & Maniadakis, Nikolaos, 2015. "A cost Malmquist productivity index capturing group performance," European Journal of Operational Research, Elsevier, vol. 241(3), pages 796-805.
    5. Liao, Hua & Du, Yun-Fei & Huang, Zhimin & Wei, Yi-Ming, 2016. "Measuring energy economic efficiency: A mathematical programming approach," Applied Energy, Elsevier, vol. 179(C), pages 479-487.

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