Competition between regulated and non-regulated generators on electric power networks

Mumcu, Ayşe and Oğur, Serhan and Zenginobuz, Unal (2001): Competition between regulated and non-regulated generators on electric power networks.

Abstract

The ongoing restructuring of the electricity sectors in many countries raises the policy question of to what extent the public generating assets should be privatized and what the objective function of any remaining public generation companies should be. We analyze the optimal regulatory policy in the context of a mixed wholesale electricity market in which a private and a public generator engage in Cournot competition. In a standard industry without externalities, instructing the public firm to maximize profits instead of total social surplus in similar settings may turn out to be welfare improving. In an electricity market, however, the possibility of congestion in the transmission network and externalities between generators stemming from loop flows change the nature of equilibria and the optimal regulatory policy dramatically. Not only that instruction of pure welfare maximization is not a part of optimal regulatory policy in many instances, instruction of profit maximization is not a part of optimal regulatory policy, except in one case, either. We also extend the literature by allowing the public firm to maximize not only its profits or social welfare, but any convex combination of the two, as well as considering cost asymmetries and shadow cost of public funds. Furthermore, our framework also applies to a wholesale power industry where regulated private firms and unregulated private firms are competing, rather than public and private firms.

• Item Type: MPRA Paper
• Language: English
• Keywords: electricity markets; mixed markets; regulation; competition
• Subjects: L - Industrial Organization > L1 - Market Structure, Firm Strategy, and Market Performance > L13 - Oligopoly and Other Imperfect Markets; L - Industrial Organization > L5 - Regulation and Industrial Policy > L51 - Economics of Regulation; L - Industrial Organization > L4 - Antitrust Issues and Policies > L44 - Antitrust Policy and Public Enterprises, Nonprofit Institutions, and Professional Organizations; H - Public Economics > H4 - Publicly Provided Goods > H44 - Publicly Provided Goods: Mixed Markets

References

Borenstein, S., J. Bushnell, and S.E. Stoft (1998), "The Competitive Effects of Transmission Capacity in a Deregulated Electricity Industry," POWER WP-040, UC Berkeley.

Cardell, J. B., C. C. Hitt and W. W. Hogan(1996), "Market Power and Strategic Interaction in Electricity Networks.", Resources and Energy Economics, vol. 6, no. 1, pp. 25-60.

Cremer, H., M. Marchand, and J.-F. Thisse (1989), "The Public Firm as an Instrument for Regulating an Oligopolistic Market," Oxford Economic Papers 41, 283-301.

De Fraja, G. (1999), "Regulation and Excess Pricing with Asymmetric Information," European Economic Review 43, 109-134.

De Fraja, G., and F. Delbono (1989), "Alternative Strategies of a Public Enterprise in Oligopoly," Oxford Economic Papers 41, 302-311.

De Fraja, G., and F. Delbono (1990), "Game Theoretic Models of Mixed Oligopoly," Journal of Economic Surveys 4, 1-17.

Gilbert, R. J., and E. P. Kahn, eds. (1996), "Competition and Institutional Change in the US Electric Power Regulation" in Gilbert, R. J., and E. P. Kahn, eds., International Comparisons of Electricity Regulation, Cambridge, U.K., Cambridge University Press.

Hjalmarsson, L. (1996), "From Club-regulation to Market Competition in the Scandinavian Electricity Supply Industry", in Gilbert, R. J., and E. P. Kahn, eds., International Comparisons of Electricity Regulation, Cambridge, U.K., Cambridge University Press.

Joskow, P., and J. Tirole, (1999). "Transmission Rights and Market Power on Electric Power Networks I: Financial Rights," CEPR Discussion Paper No. 2093.

Joskow, P., and J. Tirole, (1999). "Transmission Rights and Market Power on Electric Power Networks II: Physical Rights," CEPR Discussion Paper No. 2087.

Joskow, P. and J. Tirole (2000), "Transmission Rights and Market Power on Electric Power Networks," forthcoming in RAND Journal of Economics.

Matsumura, T., (1998). "Partial Privatization in Mixed Duopoly", Journal of Public Economics 70, 473-483.

Newbery, D. M., and R. Green (1996), "Regulation, Public Ownership and Privatization of the English Electricity Industry", in Gilbert, R. J., and E. P. Kahn, eds., International Comparisons of Electricity Regulation, Cambridge, U.K., Cambridge University Press.

Oren, S. S. (1997), "Economic Inefficiency of Passive Transmission Rights in Congested Electricity Systems with Competitive Genaration", The Energy Journal, vol. 18, no. 1, pp. 63-83.

Sertel, M.R., (1988)."Regulation by Participation," Journal of Economics, No. 2, 111-134.

Smeers, Y. And Wei, J.-Y. (1997), "Do We Need a Power Exchange if There are Enough Power Marketers?" CORE Discussion Paper No. 9760, CORE, Universite Catholique de Louvain, Belgium.

Wolak, F. A. And R. H. Patrick (1996), "The Impact of Market Rules and Market Structure on the Price Determination Process in the England and Wales Electricity Market." Mimeo, Stanford University.