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Long-Term Supply Contracts and Collusion in the Electricity Markets

Author

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  • Le Coq, Chloé

    (Dept. of Economics, Stockholm School of Economics)

Abstract

It has been argued that having a contract market before the spot market enhances competition (Allaz and Vila, 1993). Taking into account the repeated nature of electricity markets, we check the robustness of the argument that the access to contract markets reduces the market power of generators. In particular, we investigate the sensitivity of this result with respect to the finite horizon assumption. This paper proposes a model of the electricity market where firms sign long-term supply contracts with their retailers. Subsequently, the firms repeatedly interact on the spot market. It is shown that contract markets help sustain collusion on the spot market.

Suggested Citation

  • Le Coq, Chloé, 2003. "Long-Term Supply Contracts and Collusion in the Electricity Markets," SSE/EFI Working Paper Series in Economics and Finance 552, Stockholm School of Economics.
    • Handle: RePEc:hhs:hastef:0552
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    References listed on IDEAS

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    1. Monika Schnitzer, 1994. "Dynamic Duopoly with Best-Price Clauses," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 186-196, Spring.
    2. Davidson, Carl & Deneckere, Raymond J, 1990. "Excess Capacity and Collusion," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 31(3), pages 521-541, August.
    3. Frank Wolak, 2000. "An Empirical Analysis of the Impact of Hedge Contracts on Bidding Behavior in a Competitive Electricity Market," International Economic Journal, Taylor & Francis Journals, vol. 14(2), pages 1-39.
    4. Severin Borenstein & James Bushnell, 1999. "An Empirical Analysis of the Potential for Market Power in California’s Electricity Industry," Journal of Industrial Economics, Wiley Blackwell, vol. 47(3), pages 285-323, September.
    5. Richard Green, 1999. "The Electricity Contract Market in England and Wales," Journal of Industrial Economics, Wiley Blackwell, vol. 47(1), pages 107-124, March.
    6. Natalia Fabra, 2003. "Tacit Collusion in Repeated Auctions: Uniform Versus Discriminatory," Journal of Industrial Economics, Wiley Blackwell, vol. 51(3), pages 271-293, September.
    7. Ronald W Anderson & Tiziano Brianza, 1991. "Cartel Behaviour and Futures Trading," CEPR Financial Markets Paper 0014, European Science Foundation Network in Financial Markets, c/o C.E.P.R, 33 Great Sutton Street, London EC1V 0DX..
    8. repec:bla:jindec:v:47:y:1999:i:1:p:107-24 is not listed on IDEAS
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    Cited by:

    1. Willems, Bert & De Corte, Emmanuel, 2008. "Market power mitigation by regulating contract portfolio risk," Energy Policy, Elsevier, vol. 36(10), pages 3787-3796, October.

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    More about this item

    Keywords

    Contract market; Electricity; Spot Market; Forward; Tacit collusion.;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L94 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Electric Utilities

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