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The Fall in British Electricity Prices: Market Rules, Market Structure, or Both?

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Author Info

  • Natalia Fabra

    (Universidad Carlos III de Madrid)

  • Juan Toro

    (centrA)

Abstract

In this paper we investigate the factors contributing to the fall in the Lerner Index (price-cost margin) in the British electricity market during the 90s. A first stage of our analysis models the number of breaks in the Lerner Index and their dating as unknowns. Our results suggest the existence of one structural break in the time series of the Lerner Index. The break point interval includes the go-live of the New Electricity Trading Arrangements (NETA), but also several other (but not all) regulatory interventions. In a second stage, we construct a general regression model for the Lerner index as a function of the regulatory interventions within the estimated break point interval, the Herfindahl- Hirschman Index (HHI), and the demand-capacity ratio. The results show that both the HHI and the demand-capacity ratio are strongly significant for explaining the fall in the Lerner Index. NETA is also significant, even when the Lerner Index is corrected for the influence of the HHI and the demand-capacity ratio.

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Bibliographic Info

Paper provided by EconWPA in its series Industrial Organization with number 0309001.

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Date of creation: 16 Sep 2003
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Handle: RePEc:wpa:wuwpio:0309001

Note: Type of Document - Tex; prepared on IBM PC; to print on HP;
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Web page: http://128.118.178.162

Related research

Keywords: Electricity Markets; Regulatory Reform; Structural Breaks;

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References

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  1. Natalia Fabra, 2003. "Tacit Collusion in Repeated Auctions: Uniform Versus Discriminatory," Journal of Industrial Economics, Wiley Blackwell, vol. 51(3), pages 271-293, 09.
  2. Jushan Bai & Pierre Perron, 2003. "Critical values for multiple structural change tests," Econometrics Journal, Royal Economic Society, vol. 6(1), pages 72-78, 06.
  3. BAI, Jushan & PERRON, Pierre, 1998. "Computation and Analysis of Multiple Structural-Change Models," Cahiers de recherche 9807, Universite de Montreal, Departement de sciences economiques.
  4. Donald W.K. Andrews, 1990. "Tests for Parameter Instability and Structural Change with Unknown Change Point," Cowles Foundation Discussion Papers 943, Cowles Foundation for Research in Economics, Yale University.
  5. Chib, Siddhartha, 1998. "Estimation and comparison of multiple change-point models," Journal of Econometrics, Elsevier, vol. 86(2), pages 221-241, June.
  6. Natalia Fabra & Nils-Henrik von der Fehr & David Harbord, 2002. "Designing Electricity Auctions," Microeconomics 0211017, EconWPA, revised 31 Aug 2003.
  7. Perron, P. & Bai, J., 1995. "Estimating and Testing Linear Models with Multiple Structural Changes," Cahiers de recherche 9552, Universite de Montreal, Departement de sciences economiques.
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Cited by:
  1. Kalantzis, Fotis & Sakellaris, Kostis, 2012. "Investigating the Impact of the Greek Electricity Market Reforms on its Day-Ahead Market Prices," MPRA Paper 37794, University Library of Munich, Germany.
  2. Heim, Sven & Götz, Georg, 2013. "Do pay-as-bid auctions favor collusion? Evidence from Germany's market for reserve power," ZEW Discussion Papers 13-035, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
  3. Paul Twomey & Richard Green & Karsten Neuhoff & David Newbery, 2005. "A Review of the Monitoring of Market Power: The Possible Roles of TSOs in Monitoring for Market Power Issues in Congested Transmission Systems," Working Papers 0502, Massachusetts Institute of Technology, Center for Energy and Environmental Policy Research.
  4. Karakatsani, Nektaria V. & Bunn, Derek W., 2008. "Forecasting electricity prices: The impact of fundamentals and time-varying coefficients," International Journal of Forecasting, Elsevier, vol. 24(4), pages 764-785.
  5. Giulietti, Monica & Grossi, Luigi & Waterson, Michael, 2009. "Price transmission in the UK electricity market : was NETA beneficial?," The Warwick Economics Research Paper Series (TWERPS) 913, University of Warwick, Department of Economics.
  6. Sweeting, A., 2004. "Market Power in the England and Wales Wholesale Electricity Market 1995-2000," Cambridge Working Papers in Economics 0455, Faculty of Economics, University of Cambridge.
  7. Malaguzzi Valeri, Laura, 2006. "Comparison of Electricity Deregulation around the World and Implications for Ireland," Quarterly Economic Commentary: Special Articles, Economic and Social Research Institute (ESRI), vol. 2006(3-Autumn), pages 38-63.
  8. Karakatsani, Nektaria V. & Bunn, Derek W., 2008. "Intra-day and regime-switching dynamics in electricity price formation," Energy Economics, Elsevier, vol. 30(4), pages 1776-1797, July.

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