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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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    1. William Novshek, 1985. "On the Existence of Cournot Equilibrium," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 52(1), pages 85-98.
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    3. Yoshiaki Ushio, 1983. "Cournot Equilibrium with Free Entry: The Case of Decreasing Average Cost Functions," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 50(2), pages 347-354.
    4. Szidarovszky, F. & Yakowitz, S., 1982. "Contributions to Cournot oligopoly theory," Journal of Economic Theory, Elsevier, vol. 28(1), pages 51-70, October.
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    More about this item

    Keywords

    Cournot equilibrium; non-cooperative oligopoly; quasi-competitiveness; stability;
    All these keywords.

    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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