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Measuring Welfare in Restructured Electricity Markets

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  • Erin T. Mansur

Abstract

Restructuring electricity markets has enabled wholesalers to exercise market power. Using a common method of measuring competitive behavior in these markets, several studies have found substantial inefficiencies. This method overstates actual welfare loss by ignoring production constraints that result in non-convex costs. I develop an alternative method that accounts for these constraints and apply it to the Pennsylvania, New Jersey, and Maryland market. For the summer following restructuring, the common method implies that market imperfections resulted in considerable welfare loss, with actual production costs exceeding the competitive model's estimates by 13 to 21 percent. In contrast, my method finds that actual costs were only between three and eight percent above the competitive levels. In particular, it is the fringe firms whose costs increase, while strategic firms reduce production and costs.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 13509.

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Date of creation: Oct 2007
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Handle: RePEc:nbr:nberwo:13509

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References

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  1. Murphy, Kevin M & Topel, Robert H, 2002. "Estimation and Inference in Two-Step Econometric Models," Journal of Business & Economic Statistics, American Statistical Association, vol. 20(1), pages 88-97, January.
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  5. Stephen P. Holland & Erin T. Mansur, 2008. "Is Real-Time Pricing Green? The Environmental Impacts of Electricity Demand Variance," The Review of Economics and Statistics, MIT Press, vol. 90(3), pages 550-561, August.
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  10. Severin Borenstein & James B. Bushnell & Frank A. Wolak, 2002. "Measuring Market Inefficiencies in California's Restructured Wholesale Electricity Market," American Economic Review, American Economic Association, vol. 92(5), pages 1376-1405, December.
  11. Harvey, Scott M. & Hogan, William W., 2001. "On the Exercise of Market Power Through Strategic Withholding in California," Working paper 73, Regulation2point0.
  12. Mansur, Erin T, 2007. "Upstream Competition and Vertical Integration in Electricity Markets," Journal of Law and Economics, University of Chicago Press, vol. 50(1), pages 125-56, February.
  13. James B. Bushnell & Erin T. Mansur & Celeste Saravia, 2008. "Vertical Arrangements, Market Structure, and Competition: An Analysis of Restructured US Electricity Markets," American Economic Review, American Economic Association, vol. 98(1), pages 237-66, March.
  14. Steven L. Puller, 2007. "Pricing and Firm Conduct in California's Deregulated Electricity Market," The Review of Economics and Statistics, MIT Press, vol. 89(1), pages 75-87, February.
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Citations

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Cited by:
  1. Erin T. Mansur, 2007. "Prices vs. Quantities: Environmental Regulation and Imperfect Competition," NBER Working Papers 13510, National Bureau of Economic Research, Inc.
  2. Rubin, Ofir D. & Babcock, Bruce A., 2011. "A novel approach for modeling deregulated electricity markets," Energy Policy, Elsevier, vol. 39(5), pages 2711-2721, May.
  3. James B. Bushnell & Erin T. Mansur & Celeste Saravia, 2008. "Vertical Arrangements, Market Structure, and Competition: An Analysis of Restructured US Electricity Markets," American Economic Review, American Economic Association, vol. 98(1), pages 237-66, March.
  4. Erin T. Mansur, 2007. "Do Oligopolists Pollute Less? Evidence from a Restructured Electricity Market," NBER Working Papers 13511, National Bureau of Economic Research, Inc.
  5. Hesamzadeh, Mohammad R. & Biggar, Darryl R. & Hosseinzadeh, Nasser, 2011. "The TC-PSI indicator for forecasting the potential for market power in wholesale electricity markets," Energy Policy, Elsevier, vol. 39(10), pages 5988-5998, October.
  6. Meredith Fowlie, 2008. "Incomplete Environmental Regulation, Imperfect Competition, and Emissions Leakage," NBER Working Papers 14421, National Bureau of Economic Research, Inc.
  7. Wolf-Peter, Schill, 2011. "Electric vehicles in imperfect electricity markets: The case of Germany," Energy Policy, Elsevier, vol. 39(10), pages 6178-6189, October.
  8. Ali Hortacsu & Steven L. Puller, 2005. "Understanding Strategic Bidding in Restructured Electricity Markets: A Case Study of ERCOT," NBER Working Papers 11123, National Bureau of Economic Research, Inc.
  9. Milan Vondráček & Tomáš Skuček, 2010. "Unbundling costs in the energy sector: competitive environment for the customers´ benefits or too costly experiment?," Ekonomika a Management, University of Economics, Prague, vol. 2010(3).
  10. Fell, Harrison & Linn, Joshua, 2013. "Renewable electricity policies, heterogeneity, and cost effectiveness," Journal of Environmental Economics and Management, Elsevier, vol. 66(3), pages 688-707.
  11. Graf, Christoph & Wozabal, David, 2013. "Measuring competitiveness of the EPEX spot market for electricity," Energy Policy, Elsevier, vol. 62(C), pages 948-958.
  12. Fridolfsson, Sven-Olof & Tangerås, Thomas P., 2009. "Market power in the Nordic electricity wholesale market: A survey of the empirical evidence," Energy Policy, Elsevier, vol. 37(9), pages 3681-3692, September.

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