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Price increase and stability with new entries in Cournot markets

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Abstract

It is widely accepted in the literature about the classical Cournot oligopoly model that the loss of quasi–competitiveness is linked, in the long run as new firms enter the market, to instability of the equilibrium. In this paper, though, we present a model in which a stable unique symmetric equilibrium is reached for any number of oligopolists as industry price increases with each new entry. Consequently, the suspicion that non–quasi–competitiveness implies, in the long run, instability is proved false.

Suggested Citation

  • Ramon Villanova & Jaume Paradís & Pelegrí Viader & Joan Miralles, 2002. "Price increase and stability with new entries in Cournot markets," Economics Working Papers 646, Department of Economics and Business, Universitat Pompeu Fabra, revised Jan 2012.
  • Handle: RePEc:upf:upfgen:646
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    References listed on IDEAS

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    1. William Novshek, 1985. "On the Existence of Cournot Equilibrium," Review of Economic Studies, Oxford University Press, vol. 52(1), pages 85-98.
    2. Yoshiaki Ushio, 1983. "Cournot Equilibrium with Free Entry: The Case of Decreasing Average Cost Functions," Review of Economic Studies, Oxford University Press, vol. 50(2), pages 347-354.
    3. Szidarovszky, F. & Yakowitz, S., 1982. "Contributions to Cournot oligopoly theory," Journal of Economic Theory, Elsevier, vol. 28(1), pages 51-70, October.
    4. R. J. Ruffin, 1971. "Cournot Oligopoly and Competitive Behaviour," Review of Economic Studies, Oxford University Press, vol. 38(4), pages 493-502.
    5. F. H. Hahn, 1962. "The Stability of the Cournot Oligopoly Solution," Review of Economic Studies, Oxford University Press, vol. 29(4), pages 329-331.
    6. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, January.
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    More about this item

    Keywords

    Cournot equilibrium; non-cooperative oligopoly; quasi-competitiveness; stability;

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium

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