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Vertical Structure and Forward Contract in Electricity Market

  • Yuanjing Li

The pro-competitive effects of forward contracts in electricity market can- not be regarded alone without examining the market structure. In this paper, we show that under retail competition, spot market demand uncertainty and risk aversion, partially or fully integrated electricity generators and retailers have less incentives to be involved in trading electricity under forward con- tracts. Therefore, the effect of market power mitigation of forward contracts is countered by this vertical relationship between retailers and generators since it provides a natural hedging device as a substitute of forward contracts to the retailers. Both analytic framework and numerical simulation suggest that the optimal quantity of forward sales decreases and spot price increases with the degree of vertical control of retailers over generators' assets. We thus conclude that the retailers' ownership over generators' proffts could give rise to generators exercising market power in electricity spot market.

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Paper provided by Department of Research, Ipag Business School in its series Working Papers with number 2014-117.

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Length: 28 pages
Date of creation: 25 Feb 2014
Date of revision:
Handle: RePEc:ipg:wpaper:2014-117
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Web page: http://www.ipag.fr

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  1. Stephen C. Littlechild, 2002. "Competition in Retail Electricity Supply," Cambridge Working Papers in Economics 0227, Faculty of Economics, University of Cambridge.
  2. Green, Richard & Newbery, David M G, 1991. "Competition in the British Electricity Spot Market," CEPR Discussion Papers 557, C.E.P.R. Discussion Papers.
  3. Powell, Andrew, 1993. "Trading Forward in an Imperfect Market: The Case of Electricity in Britain," Economic Journal, Royal Economic Society, vol. 103(417), pages 444-53, March.
  4. Frank A. Wolak, 2007. "Quantifying the supply-side benefits from forward contracting in wholesale electricity markets," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 22(7), pages 1179-1209.
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