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Rationalizability and Efficiency in an Asymmetric Cournot Oligopoly

Author

Listed:
  • Gabriel Desgranges

    (THEMA - Théorie économique, modélisation et applications - CNRS - Centre National de la Recherche Scientifique - CY - CY Cergy Paris Université)

  • Stéphane Gauthier

    (THEMA - Théorie économique, modélisation et applications - CNRS - Centre National de la Recherche Scientifique - CY - CY Cergy Paris Université)

Abstract

We study rationalizable solutions in a linear asymmetric Cournot oligopoly. We show that symmetry across firms favors multiplicity of rationalizable solutions: A merger (implying a greater asymmetry across firms) makes out-of-equilibrium behavior less likely and should dampen &lquo;coordination&rquo; volatility. The market structure maximizing consumers' surplus at a rationalizable solution is not always the competitive one: This may be a symmetric oligopoly with few firms. An empirical illustration to the airlines industry shows that a reallocation of 1% of market share from a small carrier to a larger one yields a 1.3% decrease in volatility, measured by the within carrier standard error of the number of passengers
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Suggested Citation

  • Gabriel Desgranges & Stéphane Gauthier, 2016. "Rationalizability and Efficiency in an Asymmetric Cournot Oligopoly," Post-Print hal-02980111, HAL.
    • Handle: RePEc:hal:journl:hal-02980111
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    Cited by:

    1. Philippe Gagnepain & Stéphane Gauthier, 2021. "Strategic uncertainty and market size: An illustration on the Wright amendment," Working Papers halshs-03359597, HAL.
    2. Alexandra Belova & Philippe Gagnepain & Stéphane Gauthier, 2020. "An assessment of Nash equilibria in the airline industry," Working Papers halshs-02932780, HAL.
    3. Richard Cornes & Luciana C. Fiorini & Wilfredo L. Maldonado, 2021. "Expectational stability in aggregative games," Journal of Evolutionary Economics, Springer, vol. 31(1), pages 235-249, January.
    4. Gabriel Desgranges & Stéphane Gauthier, 2023. "Fundamental Volatility and Financial Stability," Working Papers halshs-04210677, HAL.

    More about this item

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations
    • L40 - Industrial Organization - - Antitrust Issues and Policies - - - General

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