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Bilateral Market Power and Vertical Integration in the Spanish Electricity Spot Market

Author

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  • Kühn, Kai-Uwe
  • Machado, Matilde

Abstract

The Spanish electricity spot market is highly concentrated both on the seller and the buyer side. Furthermore, unlike electricity spot markets in other deregulated electricity systems, large buyers and sellers are typically vertically integrated. This allows both large net sellers and large net buyers to strategically influence the spot market price. We develop a supply function model of this market to analyse the impact of market power on prices and productive efficiency and use it empiricially to detect such bilateral market power. Our estimates suggest that market power has had little impact on spot market prices but that substantial productive inefficiencies may have arisen from the exercise of bilateral market power.

Suggested Citation

  • Kühn, Kai-Uwe & Machado, Matilde, 2004. "Bilateral Market Power and Vertical Integration in the Spanish Electricity Spot Market," CEPR Discussion Papers 4590, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:4590
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    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
    • L94 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Electric Utilities

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