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Demand Elasticity and Market Power in the Spanish Electricity Market

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Author Info
Aitor Ciarreta () (Departamento de Fundamentos del Analisis Economico II, Universidad del Pais Vasco)
Maria Paz Espinosa () (Departamento de Fundamentos del Analisis Economico II, Universidad del Pais Vasco)

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Abstract

In this paper we check whether generators' bid behavior at the Spanish wholesale electricity market is consistent with the hypothesis of pro?fit maximization on their residual demands. Using OMEL data, we ?find the arc-elasticity of the residual demand around the system marginal price. The results suggest that the larger ?firms are not actually pro?fit-maximizing on their residual demands while smaller generators' behavior is consistent with profit maximization. We argue how the regulatory environment may drive these results. Finally, we repeat the analysis for the ?first session of the intra-day market where presumably ?firms may not have the same incentives as in the day-ahead market

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File URL: http://selene.uab.es/dep-economia-empresa/documents/06-6.pdf
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Publisher Info
Paper provided by Department of Business Economics, Universitat Autonoma de Barcelona in its series Working Papers with number 200606.

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Date of creation: Jul 2006
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Handle: RePEc:bbe:wpaper:200606

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Related research
Keywords: market power; electricity market; residual demand elasticity; pro?fit maximization;

Find related papers by JEL classification:
L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
L51 - Industrial Organization - - Regulation and Industrial Policy - - - Economics of Regulation

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References listed on IDEAS
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  1. Natalia Fabra, 2003. "Tacit Collusion in Repeated Auctions: Uniform Versus Discriminatory," Journal of Industrial Economics, Blackwell Publishing, vol. 51(3), pages 271-293, 09. [Downloadable!] (restricted)
  2. Severin Borenstein & James B. Bushnell & Frank A. Wolak, 2002. "Measuring Market Inefficiencies in California's Restructured Wholesale Electricity Market," American Economic Review, American Economic Association, vol. 92(5), pages 1376-1405, December. [Downloadable!]
  3. Delgado, Miguel A., 1993. "Testing the equality of nonparametric regression curves," Statistics & Probability Letters, Elsevier, vol. 17(3), pages 199-204, June. [Downloadable!] (restricted)
  4. Ferreira, E. & Stute, W., 2004. "Testing for Differences Between Conditional Means in a Time Series Context," Journal of the American Statistical Association, American Statistical Association, vol. 99, pages 169-174, January. [Downloadable!] (restricted)
  5. Castro-Rodriguez, Fidel & Marín Uribe, Pedro Luis & Siotis, Georges, 2001. "Capacity Choices in Liberalized Electricity Markets," CEPR Discussion Papers 2998, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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  6. David Harbord & Natalia Fabra & Nils-Henrik von der Fehr, 2002. "Modeling Electricity Auctions," Game Theory and Information 0206001, EconWPA. [Downloadable!]
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  7. Paul Klemperer, 2002. "What Really Matters in Auction Design," Journal of Economic Perspectives, American Economic Association, vol. 16(1), pages 169-189, Winter. [Downloadable!] (restricted)
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  8. 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)
  9. Garcia-Diaz, Anton & Marin, Pedro L., 2003. "Strategic bidding in electricity pools with short-lived bids: an application to the Spanish market," International Journal of Industrial Organization, Elsevier, vol. 21(2), pages 201-222, February. [Downloadable!] (restricted)
  10. 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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