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Market Power and the Power Market: Multi-unit Bidding and (In)Efficiency in Electricity Auctions

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  • Parisio, Lucia
  • Bosco, Bruno

Abstract

In this paper we apply auction theory to the modelling of competition in a multi-unit wholesale electricity market. Bidding strategies of multi-plant producers are derived and examined assuming various degrees of market concentration. Unlike previous literature, which mainly focuses on demand uncertainty, we assume both demand and cost uncertainty as well as cost differentials among the two types of generating units considered in the model, namely baseload units and peak units. Results indicate that the System Marginal Price (competitive pricing) rule provides incentives for bid shading on the part of all those generators-units who have a non-null probability of setting the market price. We also show that the extent of the bid shading is positively affected by the differential in the endowments of the baseload generation capacity of multi-plant firms. The inefficiency of the resulting allocation is also examined and some policy implications are briefly discussed. Copyright 2003 by Kluwer Academic Publishers

Suggested Citation

  • Parisio, Lucia & Bosco, Bruno, 2003. "Market Power and the Power Market: Multi-unit Bidding and (In)Efficiency in Electricity Auctions," International Tax and Public Finance, Springer;International Institute of Public Finance, vol. 10(4), pages 377-401, August.
    • Handle: RePEc:kap:itaxpf:v:10:y:2003:i:4:p:377-401
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    Citations

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    Cited by:

    1. Pär Holmberg & Frank Wolak, 2015. "Electricity markets: Designing auctions where suppliers have uncertain costs," Working Papers EPRG 1523, Energy Policy Research Group, Cambridge Judge Business School, University of Cambridge.
    2. Sandro Sapio, 2004. "Markets Design, Bidding Rules, and Long Memory in Electricity Prices," Revue d'Économie Industrielle, Programme National Persée, vol. 107(1), pages 151-170.
    3. Bruno Bosco, Lucia Parisio and Matteo Pelagatti, 2016. "Price coordination in vertically integrated electricity markets. Theory and empirical evidence," The Energy Journal, International Association for Energy Economics, vol. 0(Number 1).
    4. Parisio, Lucia & Bosco, Bruno, 2008. "Electricity prices and cross-border trade: Volume and strategy effects," Energy Economics, Elsevier, vol. 30(4), pages 1760-1775, July.
    5. Holmberg, Pär & Newbery, David, 2010. "The supply function equilibrium and its policy implications for wholesale electricity auctions," Utilities Policy, Elsevier, vol. 18(4), pages 209-226, December.
    6. Natalia Fabra & Nils‐Henrik Fehr & David Harbord, 2006. "Designing electricity auctions," RAND Journal of Economics, RAND Corporation, vol. 37(1), pages 23-46, March.
    7. repec:syb:wpbsba:06/2013 is not listed on IDEAS
    8. MacCormack, John & Hollis, Aidan & Zareipour, Hamidreza & Rosehart, William, 2010. "The large-scale integration of wind generation: Impacts on price, reliability and dispatchable conventional suppliers," Energy Policy, Elsevier, vol. 38(7), pages 3837-3846, July.
    9. Estrella Alonso & Juan Tejada, 2010. "Equivalencia de Ingresos en un Duopolio Eléctrico," Latin American Journal of Economics-formerly Cuadernos de Economía, Instituto de Economía. Pontificia Universidad Católica de Chile., vol. 47(136), pages 191-215.
    10. Holmberg, Pär & Newbery, David & Ralph, Daniel, 2013. "Supply function equilibria: Step functions and continuous representations," Journal of Economic Theory, Elsevier, vol. 148(4), pages 1509-1551.
    11. Silvester van Koten, 2007. "Legally Separated Joint Ownership of Bidder and Auctioneer: Illustrated by the Partial Deregulation of the EU Electricity Markets," CERGE-EI Working Papers wp346, The Center for Economic Research and Graduate Education - Economics Institute, Prague.
    12. Bruno Bosco, 2023. "Trade, equilibrium prices and rents in European auctions for emission allowances," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 25(1), pages 87-113, January.
    13. Dejan Trifunović & Bojan Ristić, 2013. "Multi-Unit Auctions In The Procurement Of Electricity," Economic Annals, Faculty of Economics and Business, University of Belgrade, vol. 58(197), pages 47-78, April – J.
    14. Bruno Bosco & Lucia Parisio & Matteo Pelagatti, 2010. "Estimating Marginal Costs and Market Power in the Italian Electricity Auctions," Working Papers 20100201, Università degli Studi di Milano-Bicocca, Dipartimento di Statistica.
    15. Bruno Bosco & Lucia Parisio & Matteo Pelagatti & Fabio Baldi, 2010. "Long-run relations in european electricity prices," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 25(5), pages 805-832.
    16. Simona Bigerna & Carlo Andrea Bollino & Maria Chiara D’Errico & Paolo Polinori, 2023. "A new design for market power monitoring in the electricity market. A simulation for Italy," Economia Politica: Journal of Analytical and Institutional Economics, Springer;Fondazione Edison, vol. 40(1), pages 285-317, April.
    17. Bosco, Bruno & Parisio, Lucia & Pelagatti, Matteo, 2012. "Strategic bidding in vertically integrated power markets with an application to the Italian electricity auctions," Energy Economics, Elsevier, vol. 34(6), pages 2046-2057.
    18. Maria Chiara D?Errico, 2020. "Competition in the Italian electricity market: The unforeseen social welfare losses of reform," ECONOMICS AND POLICY OF ENERGY AND THE ENVIRONMENT, FrancoAngeli Editore, vol. 2020(2), pages 75-91.

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