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Market Power in Electricity Markets: Beyond Concentration Measures


  • Borenstein, Severin
  • Bushnell, James
  • Knittel, Chris


The wave of electricity market restructuring both within the United States and abroad has brought the issue of horizontal market power to the forefront of energy policy. Traditionally, estimation and prediction of market power has relied heavily on concentration measures. In this paper, we discuss the weaknesses of concentration measures as a viable measure of market power in the electricity industry, and we propose an alternative method based oil market simulations that take advantage of existing plant level data. We discuss results from previous studies the authors have performed, and present new results that allow for the detection of threshold demand levels where market power is likely to be a problem. In addition, we analyze the impact of that recent divestitures in the California electricity market will have on estimated market power. We close with a discussion of the policy implications of the results.
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  • Borenstein, Severin & Bushnell, James & Knittel, Chris, 1999. "Market Power in Electricity Markets: Beyond Concentration Measures," Staff General Research Papers Archive 31548, Iowa State University, Department of Economics.
  • Handle: RePEc:isu:genres:31548

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    References listed on IDEAS

    1. Cramton, Peter & Stoft, Steven, 2005. "A Capacity Market that Makes Sense," The Electricity Journal, Elsevier, vol. 18(7), pages 43-54.
    2. Severin Borenstein, 2005. "The Long-Run Efficiency of Real-Time Electricity Pricing," The Energy Journal, International Association for Energy Economics, vol. 0(Number 3), pages 93-116.
    3. Borenstein, Severin & Bushnell, James, 2000. "Electricity Restructuring: Deregulation or Reregulation?," Competition Policy Center, Working Paper Series qt22d2q3fn, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
    4. Bushnell, James, 2005. "Electricity Resource Adequacy: Matching Policies and Goals," The Electricity Journal, Elsevier, vol. 18(8), pages 11-21, October.
    5. Palmer, Karen & Ando, Amy, 1998. "Getting on the Map: The Political Economy of State-Level Electricity Restructuring," Discussion Papers dp-98-19-rev, Resources For the Future.
    6. Nemet, Gregory F., 2006. "Beyond the learning curve: factors influencing cost reductions in photovoltaics," Energy Policy, Elsevier, vol. 34(17), pages 3218-3232, November.
    7. Ellerman,A. Denny & Joskow,Paul L. & Schmalensee,Richard & Montero,Juan-Pablo & Bailey,Elizabeth M., 2005. "Markets for Clean Air," Cambridge Books, Cambridge University Press, number 9780521023894, March.
      • Ellerman,A. Denny & Joskow,Paul L. & Schmalensee,Richard & Montero,Juan-Pablo & Bailey,Elizabeth M., 2000. "Markets for Clean Air," Cambridge Books, Cambridge University Press, number 9780521660839, March.
    8. Lamont, Alan D., 2008. "Assessing the long-term system value of intermittent electric generation technologies," Energy Economics, Elsevier, vol. 30(3), pages 1208-1231, May.
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    JEL classification:

    • F0 - International Economics - - General


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