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Correlated Equilibria in Competitive Market Games

Author

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  • Giraud, G.

Abstract

We investigate properties of correlated equilibria in competitive, pure-exchange market games. We prove that: 1) the game defined in Schmeidler (1980) always admits the no-trade issue as mixed equilibrium outcome; 2) non-pure correlated equilibria may exist in every competitive strategic market game, and share very "bad" properties (indeterminacy and Pareto-inefficiency), calling for some way to purify them. We then interpret correlated equilibria as strategic sunspots resulting from a strategic incompleteness of markets, due to the fact that players are unable to insure themselves against strategies played by their opponents.

Suggested Citation

  • Giraud, G., 1997. "Correlated Equilibria in Competitive Market Games," Papiers d'Economie Mathématique et Applications 97.83, Université Panthéon-Sorbonne (Paris 1).
    • Handle: RePEc:fth:pariem:97.83
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    Keywords

    GAMES;

    JEL classification:

    • D41 - Microeconomics - - Market Structure, Pricing, and Design - - - Perfect Competition
    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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