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The measurement of scope, scale and diversification economies: How (in)efficient is electricity restructuring and unbundling?

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  • Pablo Arocena

    () (Universidad Pública de Navarra)

Abstract

This paper estimates the degree of economies of scope, diversification and scale in the Spanish electricity industry by means of Data Envelopment Analysis. Our results show that there exist economies of integrating power generation and distribution, as well as economies of product diversification at the generation stage. Particularly, the hypothetical vertical unbundling and the generating product specialization of the existing diversified firms would raise the total operating costs of the Spanish electricity sector by 4.7 and 3.5 percent respectively. Additionally, size appears to be irrelevant provided that vertical scope and product-mix are preserved. Further, it is estimated that overall operating costs of the sector could be reduced by 2.7% by partitioning each of the diversified firms down the middle. In addition to improving firms? scale efficiency, such fragmentation would help to create a more competitive market structure.

Suggested Citation

  • Pablo Arocena, 2005. "The measurement of scope, scale and diversification economies: How (in)efficient is electricity restructuring and unbundling?," Working Papers 2005/1, Institut d'Economia de Barcelona (IEB).
  • Handle: RePEc:ieb:wpaper:212905art64
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    References listed on IDEAS

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    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. Kwoka, John E., 2002. "Vertical economies in electric power: evidence on integration and its alternatives," International Journal of Industrial Organization, Elsevier, vol. 20(5), pages 653-671, May.
    3. Russell Pittman, 2001. "Vertical Restructuring of the Infrastructure Sectors of Transition Economies," Industrial Organization 0111002, EconWPA.
    4. Russell Pittman, 2003. "Vertical Restructuring (or Not) of the Infrastructure Sectors of Transition Economies," Journal of Industry, Competition and Trade, Springer, vol. 3(1), pages 5-26, March.
    5. Kwon, Oh Sang & Yun, Won-Cheol, 2003. "Measuring economies of scope for cogeneration systems in Korea: a nonparametric approach," Energy Economics, Elsevier, vol. 25(4), pages 331-338, July.
    6. Nemoto, Jiro & Goto, Mika, 2004. "Technological externalities and economies of vertical integration in the electric utility industry," International Journal of Industrial Organization, Elsevier, vol. 22(1), pages 67-81, January.
    7. Kittelsen, Sverre A.C. & Magnussen, Jon, 2009. "Economies of scope in Norwegian hospital production - A DEA analysis," HERO On line Working Paper Series 2003:8, Oslo University, Health Economics Research Programme.
    8. Diego Prior & Magda Solà, 2000. "Technical efficiency and economies of diversification in health care," Health Care Management Science, Springer, vol. 3(4), pages 299-307, September.
    9. Jara-Diaz, Sergio & Ramos-Real, Francisco Javier & Martinez-Budria, Eduardo, 2004. "Economies of integration in the Spanish electricity industry using a multistage cost function," Energy Economics, Elsevier, vol. 26(6), pages 995-1013, November.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    DEA; Diversification; Economies of scope; Electricity; Scale efficiency;

    JEL classification:

    • D24 - Microeconomics - - Production and Organizations - - - Production; Cost; Capital; Capital, Total Factor, and Multifactor Productivity; Capacity
    • L94 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Electric Utilities
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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