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The Folk theorem and bertrand competition


  • Prabal Roy Chowdhury

    () (Indian Statistical Institute, New Delhi)


We examine if the folk theorem of perfect competition holds under Bertrand competition (when firms supply all demand), both when entry is exogenous, as well as when it is free. Inter alia, we also characterize the limit equilibrium sets.

Suggested Citation

  • Prabal Roy Chowdhury, 2005. "The Folk theorem and bertrand competition," Indian Statistical Institute, Planning Unit, New Delhi Discussion Papers 05-06, Indian Statistical Institute, New Delhi, India.
  • Handle: RePEc:ind:isipdp:05-06

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    References listed on IDEAS

    1. Dastidar, Krishnendu Ghosh, 1995. "On the Existence of Pure Strategy Bertrand Equilibrium," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 5(1), pages 19-32, January.
    2. Bulow, Jeremy I & Geanakoplos, John D & Klemperer, Paul D, 1985. "Multimarket Oligopoly: Strategic Substitutes and Complements," Journal of Political Economy, University of Chicago Press, vol. 93(3), pages 488-511, June.
    3. Novshek, William & Chowdhury, Prabal Roy, 2003. "Bertrand equilibria with entry: limit results," International Journal of Industrial Organization, Elsevier, vol. 21(6), pages 795-808, June.
    4. Beth Allen & Martin Hellwig, 1986. "Bertrand-Edgeworth Oligopoly in Large Markets," Review of Economic Studies, Oxford University Press, vol. 53(2), pages 175-204.
    5. R. J. Ruffin, 1971. "Cournot Oligopoly and Competitive Behaviour," Review of Economic Studies, Oxford University Press, vol. 38(4), pages 493-502.
    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


    Bertrand oligopoly; folk theorem; limit properties; exogenous entry; free entry;

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D41 - Microeconomics - - Market Structure, Pricing, and Design - - - Perfect Competition
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets


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