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Market Power and Network Constraint in a Deregulated Electricity Market

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  • In-Koo Cho
  • Hyunsook Kim

Abstract

This paper investigates the market power and the welfare performance of the deregulated wholesale electricity market of California between 1998 and 2000 by incorporating the structure of the transmission network. While Wolfram (1999), Borenstein, Bushnell, and Wolak (2002) and Joskow and Kahn (2002) treat the difference between the market price and the marginal production cost of the marginal generator as the indicator for market power, we decompose the difference into the market power and the inefficiency arising from the network constraint. Based on public data for the market from 1998 to 2000, we demonstrate that the welfare loss due to the finite transmission capacity accounts for 29-38% of the total annual welfare loss, while the remaining portion can be explained by the market power exercised by the generators.

Suggested Citation

  • In-Koo Cho & Hyunsook Kim, 2007. "Market Power and Network Constraint in a Deregulated Electricity Market," The Energy Journal, International Association for Energy Economics, vol. 0(Number 2), pages 1-34.
    • Handle: RePEc:aen:journl:2007v28-02-a01
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    Cited by:

    1. Atkins, Karla & Chen, Jiangzhuo & Anil Kumar, V.S. & Macauley, Matthew & Marathe, Achla, 2009. "Locational market power in network constrained markets," Journal of Economic Behavior & Organization, Elsevier, vol. 70(1-2), pages 416-430, May.
    2. Simona Bigerna, Carlo Andrea Bollino and Paolo Polinori, 2016. "Market Power and Transmission Congestion in the Italian Electricity Market," The Energy Journal, International Association for Energy Economics, vol. 0(Number 2).
    3. Fridolfsson, Sven-Olof & Tangerås, Thomas P., 2009. "Market power in the Nordic electricity wholesale market: A survey of the empirical evidence," Energy Policy, Elsevier, vol. 37(9), pages 3681-3692, September.
    4. Cho, In-Koo & Kim, Hyunsook, 2013. "Assessing welfare impact of entry into power market," Energy Policy, Elsevier, vol. 61(C), pages 1046-1054.
    5. Kim, Hyunsook & Kim, Sung-Soo, 2010. "The optimal fuel mix and redistribution of social surplus in the Korean power market," Energy Policy, Elsevier, vol. 38(12), pages 7929-7938, December.

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    JEL classification:

    • F0 - International Economics - - General

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