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Asymmetric Information without Common Priors: An Indirect Evolutionary Analysis of Quantity Competition

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  • Werner Güth
  • Loreto Llorente Erviti
  • Anthony Ziegelmeyer

Abstract

The common prior assumption justifies private beliefs as posterior probabilities when updating a common prior based on individual information. Common priors are pervasive in most economic models of incomplete information and oligopoly models with asymmetrically informed firms. We dispose of the common prior assumption for a homogeneous oligopoly market with uncertain costs and firms entertaining arbitrary priors about other firms’ cost-type to analyze which priors will be evolutionarily stable when truly expected profit measures (reproductive) success. When firms believe that all other firms entertain the same beliefs Nature’s priors are not the only evolutionarily stable priors. In a second model allowing for asymmetric priors Nature’s priors are not even evolutionarily stable.

Suggested Citation

  • Werner Güth & Loreto Llorente Erviti & Anthony Ziegelmeyer, 2006. "Asymmetric Information without Common Priors: An Indirect Evolutionary Analysis of Quantity Competition," Papers on Strategic Interaction 2006-37, Max Planck Institute of Economics, Strategic Interaction Group.
    • Handle: RePEc:esi:discus:2006-37
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    More about this item

    Keywords

    (Indirect) evolution; Common prior assumption; Cournot competition;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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