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Regulating Environmental Externalities through Public Firms: A Differential Game

  • D. Dragone
  • L. Lambertini
  • A. Palestini

We investigate the possibility of using public firms to regulate polluting emissions in a Cournot oligopoly where production takes place at constant returns to scale and entails a negative environmental externality. We model the problem as a differential game and investigate (i) the Cournot-Nash game among profit-seeking firms; (ii) the Markov Perfect Nash equilibrium under social planning, where the industry output is entirely controlled by a benevolent planner aiming at the maximisation of social welfare; and (iii) the Markov Perfect Nash equilibrium in a mixed setup where at least one firm is public, while the others remain profit-seeking agents. Our analysis identifies the conditions whereby having a mixed market as a regulatory instrument suffices to drive the industry to the same output, externality and social welfare as under planning, both along the optimal path and in steady state.

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Paper provided by Dipartimento Scienze Economiche, Universita' di Bologna in its series Working Papers with number wp738.

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Date of creation: Mar 2011
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Handle: RePEc:bol:bodewp:wp738
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  1. Morch von der Fehr, N-H., 1991. "Tradable Emission Rights and Strategic Interaction," Memorandum 11/1991, Oslo University, Department of Economics.
  2. Jiunn-Rong Chiou & Jin-Li Hu, 2001. "Environmental Research Joint Ventures under Emission Taxes," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 20(2), pages 129-146, October.
  3. Hartman, Richard & Kwon, O-Sung, 2005. "Sustainable growth and the environmental Kuznets curve," Journal of Economic Dynamics and Control, Elsevier, vol. 29(10), pages 1701-1736, October.
  4. Itaya, Jun-ichi, 2008. "Can environmental taxation stimulate growth? The role of indeterminacy in endogenous growth models with environmental externalities," Journal of Economic Dynamics and Control, Elsevier, vol. 32(4), pages 1156-1180, April.
  5. Sherry Bartz & David L. Kelly, 2006. "Economic Growth and the Environment: Theory and Facts," Working Papers 0601, University of Miami, Department of Economics.
  6. Milliman, Scott R. & Prince, Raymond, 1989. "Firm incentives to promote technological change in pollution control," Journal of Environmental Economics and Management, Elsevier, vol. 17(3), pages 247-265, November.
  7. Benchekroun, Hassan & Van Long, Ngo, 2002. "On the multiplicity of efficiency-inducing tax rules," Economics Letters, Elsevier, vol. 76(3), pages 331-336, August.
  8. Karp Larry & Livernois John, 1994. "Using Automatic Tax Changes to Control Pollution Emissions," Journal of Environmental Economics and Management, Elsevier, vol. 27(1), pages 38-48, July.
  9. Hassan Benchekroun & Ngo Van Long, 1997. "Efficiency Inducing Taxation for Polluting Oligopolists," CIRANO Working Papers 97s-21, CIRANO.
  10. Downing, Paul B. & White, Lawrence J., 1986. "Innovation in pollution control," Journal of Environmental Economics and Management, Elsevier, vol. 13(1), pages 18-29, March.
  11. Newbery, David M G, 1990. "Acid Rain," CEPR Discussion Papers 442, C.E.P.R. Discussion Papers.
  12. Tsur, Yacov & Zemel, Amos, 2002. "The Regulation of Environmental Innovations," Journal of Environmental Economics and Management, Elsevier, vol. 44(2), pages 242-260, September.
  13. Yacov Tsur & Amos Zemel, 2008. "Regulating environmental threats," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 39(3), pages 297-310, March.
  14. de Fraja, Giovanni & Delbono, Flavio, 1990. " Game Theoretic Models of Mixed Oligopoly," Journal of Economic Surveys, Wiley Blackwell, vol. 4(1), pages 1-17.
  15. L. Lambertini & A. Mantovani & E. Scorcu, 2007. "Collusion Helps Abate Environmental Pollution: A Dynamic Approach," Working Papers 615, Dipartimento Scienze Economiche, Universita' di Bologna.
  16. Damania, D., 1996. "Pollution Taxes and Pollution Abatement in an Oligopoly Supergame," Journal of Environmental Economics and Management, Elsevier, vol. 30(3), pages 323-336, May.
  17. de Fraja, Giovanni & Delbono, Flavio, 1989. "Alternative Strategies of a Public Enterprise in Oligopoly," Oxford Economic Papers, Oxford University Press, vol. 41(2), pages 302-11, April.
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