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Cournot versus Supply Functions: What does the data tell us?

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Author Info
Willems, Bert
Rumiantseva, Ina
Weigt, Hannes

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Abstract

This paper compares two popular models of oligopolistic electricity markets, Cournot and the Supply Function Equilibrium (SFE), and then tests which model best describes the observed market data. Using identical demand and supply specifications, both models are calibrated to the German electricity market by varying the contract cover of firms. Our results show that each model explains almost the same fractions of the observed price variations. We therefore suggest using Cournot models for short-term analysis, since these models can accommodate additional market details, such as network constraints, and the SFE model for long-term analysis (e.g., the study of a merger) since it is less sensitive to the calibration parameters selected.

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Publisher Info
Article provided by Elsevier in its journal Energy Economics.

Volume (Year): 31 (2009)
Issue (Month): 1 (January)
Pages: 38-47
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Handle: RePEc:eee:eneeco:v:31:y:2009:i:1:p:38-47

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Keywords: Supply Function Equilibrium Cournot competition Electricity markets;

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Green, Richard J & Joanne Evans, 2003. "Why did British electricity prices fall after 1998?," Royal Economic Society Annual Conference 2003 92, Royal Economic Society. [Downloadable!]
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  2. Ross Baldick & Ryan Grant & Edward Kahn, 2004. "Theory and Application of Linear Supply Function Equilibrium in Electricity Markets," Journal of Regulatory Economics, Springer, vol. 25(2), pages 143-167, 03. [Downloadable!]
  3. Ramteen Sioshansi & Shmuel Oren, 2007. "How good are supply function equilibrium models: an empirical analysis of the ERCOT balancing market," Journal of Regulatory Economics, Springer, vol. 31(1), pages 1-35, February. [Downloadable!] (restricted)
  4. Hu, X. & Ralph, D. & Ralph, E.K. & Bardsley, P. & Ferris, M.C., 2004. "Electricity Generation with Looped Transmission Networks: Bidding to an ISO," Cambridge Working Papers in Economics 0470, Faculty of Economics, University of Cambridge. [Downloadable!]
  5. James B. Bushnell & Erin T. Mansur & Celeste Saravia, 2007. "Vertical Arrangements, Market Structure, and Competition An Analysis of Restructured U.S. Electricity Markets," NBER Working Papers 13507, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  6. Holmberg, Pär, 2005. "Asymmetric Supply Function Equilibrium with Constant Marginal Costs," Working Paper Series 2005:16, Uppsala University, Department of Economics. [Downloadable!]
  7. Delgado, Juan & Moreno, Diego, 2004. "Coalition-proof supply function equilibria in oligopoly," Journal of Economic Theory, Elsevier, vol. 114(2), pages 231-254, February. [Downloadable!] (restricted)
  8. Klemperer, Paul D & Meyer, Margaret A, 1989. "Supply Function Equilibria in Oligopoly under Uncertainty," Econometrica, Econometric Society, vol. 57(6), pages 1243-77, November. [Downloadable!] (restricted)
  9. Ciarreta, Aitor & Gutierrez-Hita, Carlos, 2006. "Supply function vs. quantity competition in supergames," International Journal of Industrial Organization, Elsevier, vol. 24(4), pages 773-783, July. [Downloadable!] (restricted)
  10. Bolle, Friedel, 1992. "Supply function equilibria and the danger of tacit collusion : The case of spot markets for electricity," Energy Economics, Elsevier, vol. 14(2), pages 94-102, April. [Downloadable!] (restricted)
  11. Severin Borenstein & James Bushnell & Christopher R. Knittel, 1999. "Market Power in Electricity Markets: Beyond Concentration Measures," The Energy Journal, International Association for Energy Economics, vol. 20(4), pages 65-88.
  12. Green, Richard J, 1996. "Increasing Competition in the British Electricity Spot Market," Journal of Industrial Economics, Blackwell Publishing, vol. 44(2), pages 205-16, June. [Downloadable!] (restricted)
  13. Green, Richard J & Newbery, David M, 1992. "Competition in the British Electricity Spot Market," Journal of Political Economy, University of Chicago Press, vol. 100(5), pages 929-53, October. [Downloadable!] (restricted)
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Janssen, Matthias & Wobben, Magnus, 2008. "Electricity Pricing and Market Power - Evidence from Germany," MPRA Paper 11400, University Library of Munich, Germany. [Downloadable!]
  2. Meredith Fowlie, 2008. "Incomplete Environmental Regulation, Imperfect Competition, and Emissions Leakage," NBER Working Papers 14421, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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