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Adapting Productivity Theory to the Quadratic Cost Function. An Application to the Spanish Electric Sector

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  • E. Martínez-Budría

    ()

  • S. Jara-Díaz

    ()

  • F. Ramos-Real

    ()

Abstract

In this article we have adapted productivity analysis to the case of a cost model using a quadratic cost function and discrete data. The main theoretical result is a productivity index that can be decomposed into modified versions of the contribution of technical change and the effect of the variations in the scale of production. This framework has been applied to the study of the Spanish electric sector from 1985 to 1996, during which relevant regulatory changes were introduced in order to increase productivity. For this, a normalized quadratic cost function was estimated. The results show important productivity gains with both technical change and scale effect playing important roles. Copyright Kluwer Academic Publishers 2003

Suggested Citation

  • E. Martínez-Budría & S. Jara-Díaz & F. Ramos-Real, 2003. "Adapting Productivity Theory to the Quadratic Cost Function. An Application to the Spanish Electric Sector," Journal of Productivity Analysis, Springer, vol. 20(2), pages 213-229, September.
  • Handle: RePEc:kap:jproda:v:20:y:2003:i:2:p:213-229
    DOI: 10.1023/A:1025184306832
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    References listed on IDEAS

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    1. Lau, Lawrence J., 1976. "A characterization of the normalized restricted profit function," Journal of Economic Theory, Elsevier, vol. 12(1), pages 131-163, February.
    2. Diewert, W. E., 1976. "Exact and superlative index numbers," Journal of Econometrics, Elsevier, vol. 4(2), pages 115-145, May.
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    Citations

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    Cited by:

    1. Ramos-Real, Francisco Javier, 2005. "Cost functions and the electric utility industry. A contribution to the debate on deregulation," Energy Policy, Elsevier, vol. 33(1), pages 69-87, January.
    2. Massimo Filippini & Martin Koller & Urs Trinkner, 2010. "Economies of scale and scope and opening hours in post offices and agencies," Chapters,in: Heightening Competition in the Postal and Delivery Sector, chapter 10 Edward Elgar Publishing.
    3. Fetz, Aurelio & Filippini, Massimo, 2010. "Economies of vertical integration in the Swiss electricity sector," Energy Economics, Elsevier, vol. 32(6), pages 1325-1330, November.
    4. Thomas P. Triebs & David S. Saal & Pablo Arocena & Subal C. Kumbhakar, 2016. "Estimating economies of scale and scope with flexible technology," Journal of Productivity Analysis, Springer, vol. 45(2), pages 173-186, April.
    5. Martinez-Budria, Eduardo & Diaz-Hernandez, Juan Jose & Jara-Däaz, Sergio, 2011. "Productivity and efficiency with discrete variables and quadratic cost function," International Journal of Production Economics, Elsevier, vol. 132(2), pages 251-257, August.
    6. Gugler, Klaus & Liebensteiner, Mario & Schmitt, Stephan, 2017. "Vertical disintegration in the European electricity sector: Empirical evidence on lost synergies," International Journal of Industrial Organization, Elsevier, vol. 52(C), pages 450-478.
    7. Sergio Jara-Díaz & Francisco Ramos-Real, 2011. "The effect of output specification on the optimal policy design for electric utilities," Journal of Regulatory Economics, Springer, vol. 40(1), pages 62-81, August.
    8. Gugler, Klaus & Liebensteiner, Mario, 2016. "Productivity Growth and the General X-factor in Austria´s Gas Distribution," Department of Economics Working Paper Series 5221, WU Vienna University of Economics and Business.
    9. Mehdi Farsi & Aurelio Fetz & Massimo Filippini, 2007. "Economies of Scale and Scope in the Swiss Multi-Utilities Sector," CEPE Working paper series 07-59, CEPE Center for Energy Policy and Economics, ETH Zurich.
    10. Farsi, Mehdi & Filippini, Massimo, 2009. "An analysis of cost efficiency in Swiss multi-utilities," Energy Economics, Elsevier, vol. 31(2), pages 306-315, March.
    11. Massimo Filippini & Martin Koller & Urs Trinkner, 2010. "Do opening hours and unobserved heterogeneity affect economies of scale and scope in postal outlets?," Quaderni della facoltà di Scienze economiche dell'Università di Lugano 1007, USI Università della Svizzera italiana.
    12. Arcos, Angel & de Toledo, Pablo Alvarez, 2009. "An analysis of the Spanish electrical utility industry: Economies of scale, technological progress and efficiency," Energy Economics, Elsevier, vol. 31(3), pages 473-481, May.
    13. repec:pal:easeco:v:43:y:2017:i:3:d:10.1057_eej.2015.56 is not listed on IDEAS

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