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Investment Incentives and Electricity Spot Market Design

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  • Grimm, Veronika
  • Zöttl, Gregor

Abstract

In liberalized electricity markets strategic firms compete in an environment characterized by fluctuating demand and non-storability of electricity. While spot market design under those conditions by now is well understood, a rigorous analysis of investment incentives is still missing. Existing models, as the peak-load-pricing approach, analyze welfare optimal investment and find that optimal investment is higher with more competitive spot markets. In this article we want to extend the analysis to investment decisions of strategic firms that anticipate competition on many consecutive spot markets with fluctuating (and possibly uncertain) demand. We study how the degree of spot market competition affects investment incentives and welfare and provide an application of the model to electricity market data. Our results show that more competitive spot market prices strictly decrease investment incentives of strategic firms. The reduction of investment incentives can be so intense to even offset the beneficial impact of more competitive spot market design. Those results obtain with and without free entry. Our analysis thus demonstrates that investment incentives necessarily have to be taken into account for a meaningful assessment of proper electricity spot market design.

Suggested Citation

  • Grimm, Veronika & Zöttl, Gregor, 2010. "Investment Incentives and Electricity Spot Market Design," Discussion Papers in Economics 11705, University of Munich, Department of Economics.
    • Handle: RePEc:lmu:muenec:11705
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    File URL: https://epub.ub.uni-muenchen.de/11705/1/Investment-June9_GZ.pdf
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    References listed on IDEAS

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    1. von der Fehr, Nils-Henrik Morch & Harbord, David, 1993. "Spot Market Competition in the UK Electricity Industry," Economic Journal, Royal Economic Society, vol. 103(418), pages 531-546, May.
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    Cited by:

    1. Elberg, Christina & Kranz, Sebastian, 2013. "Capacity Mechanisms and Effects on Market Structure," VfS Annual Conference 2013 (Duesseldorf): Competition Policy and Regulation in a Global Economic Order 79811, Verein für Socialpolitik / German Economic Association.
    2. Gregor Zöttl, 2010. "A Framework of Peak Load Pricing with Strategic Firms," Operations Research, INFORMS, vol. 58(6), pages 1637-1649, December.
    3. Grimm, Veronika & Martin, Alexander & Weibenzahl, Martin & Zoettl, Gregor, 2014. "Transmission and generation investment in electricity markets: The effects of market splitting and network fee regimes," FAU Discussion Papers in Economics 04/2014, Friedrich-Alexander University Erlangen-Nuremberg, Institute for Economics.

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    More about this item

    Keywords

    Investment; demand fluctuation; cost fluctuation; spot market design;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • D41 - Microeconomics - - Market Structure, Pricing, and Design - - - Perfect Competition
    • D42 - Microeconomics - - Market Structure, Pricing, and Design - - - Monopoly
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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