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Long run equilibria in an asymmetric oligopoly

Author

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  • Yasuhito Tanaka

    () (Faculty of Law, Chuo University, 742-1, Higashinakano, Hachioji, Tokyo, 192-03, JAPAN)

Abstract

Consider an oligopolistic industry composed of two groups (or populations) of firms, the low cost firms and the high cost firms. The firms produce a homogeneous good. I study the finite population evolutionarily stable strategy defined by Schaffer (1988), and the long run equilibrium in the stochastic evolutionary dynamics based on imitation and experimentation of strategies by firms in each group. I will show the following results. 1) The finite population evolutionarily stable strategy (ESS) output is equal to the competitive (or Walrasian) output in each group of the firms. 2) Under the assumption that the marginal cost is increasing, the ESS state is the long run equilibrium in the stochastic evolutionary dynamics in the limit as the output grid step, which will be defined in the paper, approaches to zero.

Suggested Citation

  • Yasuhito Tanaka, 1999. "Long run equilibria in an asymmetric oligopoly," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 14(3), pages 705-715.
  • Handle: RePEc:spr:joecth:v:14:y:1999:i:3:p:705-715
    Note: Received: September 19, 1997; revised: June 18, 1998
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    1. repec:spr:joecth:v:64:y:2017:i:3:d:10.1007_s00199-016-1002-3 is not listed on IDEAS
    2. Khan, Abhimanyu & Peeters, Ronald, 2015. "Imitation by price and quantity setting firms in a differentiated market," Journal of Economic Dynamics and Control, Elsevier, vol. 53(C), pages 28-36.
    3. Apesteguia, Jose & Huck, Steffen & Oechssler, Jörg & Weidenholzer, Simon, 2010. "Imitation and the evolution of Walrasian behavior: Theoretically fragile but behaviorally robust," Journal of Economic Theory, Elsevier, vol. 145(5), pages 1603-1617, September.
    4. Xiao, Tiaojun & Yu, Gang, 2006. "Supply chain disruption management and evolutionarily stable strategies of retailers in the quantity-setting duopoly situation with homogeneous goods," European Journal of Operational Research, Elsevier, vol. 173(2), pages 648-668, September.
    5. Tanaka, Yasuhito, 2001. "Evolution to equilibrium in an asymmetric oligopoly with differentiated goods," International Journal of Industrial Organization, Elsevier, vol. 19(9), pages 1423-1440, November.
    6. Huang, Weihong, 2011. "Price-taking behavior versus continuous dynamic optimizing," Journal of Economic Behavior & Organization, Elsevier, vol. 78(1), pages 37-50.
    7. repec:zbw:rwirep:0497 is not listed on IDEAS
    8. Khan, Abhimanyu & Peeters, Ronald, 2017. "Imitation and price competition in a differentiated market," Journal of Economic Dynamics and Control, Elsevier, vol. 82(C), pages 177-194.
    9. Philipowski, Robert, 2015. "Comparison of Nash and evolutionary stable equilibrium in asymmetric tax competition," Regional Science and Urban Economics, Elsevier, vol. 51(C), pages 7-13.
    10. Alos-Ferrer, Carlos, 2004. "Cournot versus Walras in dynamic oligopolies with memory," International Journal of Industrial Organization, Elsevier, vol. 22(2), pages 193-217, February.
    11. Ania, Ana B., 2008. "Evolutionary stability and Nash equilibrium in finite populations, with an application to price competition," Journal of Economic Behavior & Organization, Elsevier, vol. 65(3-4), pages 472-488, March.
    12. Moghadam, Hamed M., 2015. "Price and non-price competition in oligopoly: An analysis of relative payoff maximizers," Ruhr Economic Papers 575, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
    13. Stegeman, Mark & Rhode, Paul, 2004. "Stochastic Darwinian equilibria in small and large populations," Games and Economic Behavior, Elsevier, vol. 49(1), pages 171-214, October.
    14. Ana B. Ania & Andreas Wagener, 2014. "Laboratory Federalism: The Open Method of Coordination (OMC) as an Evolutionary Learning Process," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 16(5), pages 767-795, October.
    15. Jiang, Ge & Weidenholzer, Simon, 2016. "Local Interactions under Switching Costs," Economics Discussion Papers 17770, University of Essex, Department of Economics.
    16. Tanaka, Yasuhito, 2000. "Stochastically stable states in an oligopoly with differentiated goods: equivalence of price and quantity strategies," Journal of Mathematical Economics, Elsevier, vol. 34(2), pages 235-253, October.
    17. Peter Duersch & Albert Kolb & Jörg Oechssler & Burkhard Schipper, 2010. "Rage against the machines: how subjects play against learning algorithms," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 43(3), pages 407-430, June.
    18. Jonas Hedlund, 2015. "Imitation in Cournot oligopolies with multiple markets," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 60(3), pages 567-587, November.
    19. Leininger, Wolfgang & Moghadam, Hamed M., 2014. "Evolutionary Stability in Asymmetric Oligopoly. A Non-Walrasian Result," Ruhr Economic Papers 497, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
    20. Fernando Vega-Redondo, 1999. "Markets under bounded rationality: from theory to facts," Investigaciones Economicas, Fundación SEPI, vol. 23(1), pages 3-26, January.
    21. Wolfgang Leininger & Hamed Moghadam, 2014. "Evolutionary Stability in Asymmetric Oligopoly. A Non-Walrasian Result," Ruhr Economic Papers 0497, Rheinisch-Westfälisches Institut für Wirtschaftsforschung, Ruhr-Universität Bochum, Universität Dortmund, Universität Duisburg-Essen.

    More about this item

    Keywords

    Asymmetric oligopoly; Finite population evolutionarily stable strategy; Long run equilibrium.;

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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