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Modeling Electricity Pricing in a Deregulated Generation Industry: The Potential for Oligopoly Pricing in a Poolco

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Author Info
Aleksandr Rudkevich
Max Duckworth
Richard Rosen
Abstract

We calculate the electricity prices that would result from a pure "poolco" market with identical profit-maximizing generating firms. We advance theoretical concepts developed by Klemperer and Meyer (1989) and Green and Newbery (1992), and propose a new formula for the instantaneous market clearing price when generating firms adopt bidding strategies given by the Nash Equilibrium. Applying this formula to empirical electricity supply and demand data, we find that even in markets with a relatively high number of firms, the price of electricity is significantly higher than the short-run marginal cost of generation. We express the average annual price mark-up with a Price-Cost Margin Index, and show how it varies with market concentration, as measured by the Herfindahl-Hirschmann Index (HHI). We conclude that the Federal Energy Regulatory Commission's use of the HHI in its merger guidelines could prove inadequate in addressing market power concerns in deregulated poolco markets.

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Publisher Info
Article provided by International Association for Energy Economics in its journal The Energy Journal.

Volume (Year): 19 (1998)
Issue (Month): 3 ()
Pages: 19-48
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Handle: RePEc:aen:journl:1998v19-03-a02

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F0 - International Economics - - General

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  1. John R. Morris, 2000. "Finding Market Power in Electric Power Markets," International Journal of the Economics of Business, Taylor and Francis Journals, vol. 7(2), pages 167-178, July. [Downloadable!] (restricted)
  2. Pär Holmberg, 2009. "Supply function equilibria of pay-as-bid auctions," Journal of Regulatory Economics, Springer, vol. 36(2), pages 154-177, October. [Downloadable!] (restricted)
  3. Guido Pepermans & Bert Willems, 2005. "The potential impact of cross-ownership in transmission: An application to the Belgian electricity market," Energy, Transport and Environment Working Papers Series ete0501, Katholieke Universiteit Leuven, Centrum voor Economische Studiën, Energy, Transport and Environment. [Downloadable!]
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  4. Holmberg, Pär, 2004. "Unique Supply Function Equilibrium with Capacity Constraints," Working Paper Series 2004:20, Uppsala University, Department of Economics. [Downloadable!]
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  5. James Reitzes, 2008. "Downstream price-cap regulation and upstream market power," Journal of Regulatory Economics, Springer, vol. 33(2), pages 179-200, April. [Downloadable!] (restricted)
  6. Guido Pepermans & Bert Willems, 2004. "Ramsey Pricing in a Congested Network with Market Power in Generation: A Numerical Illustration for Belgium," Energy, Transport and Environment Working Papers Series ete0408, Katholieke Universiteit Leuven, Centrum voor Economische Studiën, Energy, Transport and Environment. [Downloadable!]
  7. Holmberg, Pär, 2005. "Asymmetric Supply Function Equilibrium with Constant Marginal Costs," Working Paper Series 2005:16, Uppsala University, Department of Economics. [Downloadable!]
  8. Bert Willems & Guido Pepermans, 2003. "Regulating transmission in a spatial oligopoly: a numerical illustration for Belgium," Energy, Transport and Environment Working Papers Series ete0314, Katholieke Universiteit Leuven, Centrum voor Economische Studiën, Energy, Transport and Environment. [Downloadable!]
  9. Rajnish Kamat & Shmuel Oren, 2004. "Two-settlement Systems for Electricity Markets under Network Uncertainty and Market Power," Journal of Regulatory Economics, Springer, vol. 25(1), pages 5-37, January. [Downloadable!] (restricted)
  10. D'Ecclesia, Rita Laura & Gallo, Crescenzio, 2002. "Price-caps and Efficient Pricing for the Electricity Italian Market," MPRA Paper 10048, University Library of Munich, Germany. [Downloadable!]
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