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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)

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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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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

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Related research
Keywords: Electricity Markets; Regulatory Reform; Structural Breaks;

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Find related papers by JEL classification:
L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions
L94 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Electric Utilities

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  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. Jushan Bai & Pierre Perron, 2003. "Critical values for multiple structural change tests," Econometrics Journal, Royal Economic Society, vol. 6(1), pages 72-78, 06. [Downloadable!] (restricted)
  3. Chib, Siddhartha, 1998. "Estimation and comparison of multiple change-point models," Journal of Econometrics, Elsevier, vol. 86(2), pages 221-241, June. [Downloadable!] (restricted)
  4. Natalia Fabra & Nils-Henrik von der Fehr & David Harbord, 2002. "Designing Electricity Auctions," Microeconomics 0211017, EconWPA, revised 31 Aug 2003. [Downloadable!]
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  5. Jushan Bai & Pierre Perron, 2003. "Computation and analysis of multiple structural change models," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 18(1), pages 1-22. [Downloadable!]
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  6. Jushan Bai & Pierre Perron, 1998. "Estimating and Testing Linear Models with Multiple Structural Changes," Econometrica, Econometric Society, vol. 66(1), pages 47-78, January.
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  7. Andrews, Donald W K, 1993. "Tests for Parameter Instability and Structural Change with Unknown Change Point," Econometrica, Econometric Society, vol. 61(4), pages 821-56, July. [Downloadable!] (restricted)
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Twomey, P. & Green, R. & Neuhoff, K. & Newbery, D., 2005. "A Review of the Monitoring of Market Power The Possible Roles of TSOs in Monitoring for Market Power Issues in Congested Transmission Systems," Cambridge Working Papers in Economics 0504, Faculty of Economics, University of Cambridge. [Downloadable!]
    Other versions:
  2. José A. García & James D. Reitzes, 2007. "International Perspectives on Electricity Market Monitoring and Market Power Mitigation," Review of Network Economics, Concept Economics, vol. 6(3), pages 397-424, September. [Downloadable!]
  3. 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. [Downloadable!]
  4. Andrew Sweeting, 2004. "Market Power in the England and Wales Wholesale Electricity," Working Papers 0413, Massachusetts Institute of Technology, Center for Energy and Environmental Policy Research. [Downloadable!]
  5. 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. [Downloadable!]
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