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Group Beliefs

Author

Listed:
  • Benjamin Brooks

    (Department of Economics, University of Chicago)

  • Songzi Du

    (Department of Economics, University of California—San Diego)

Abstract

We extend the frameworks of Harsanyi (1967) and Mertens and Zamir (1985) to study the higher-order beliefs that groups of individuals obtain by pooling their information. A universal group type space is constructed, which contains all of the belief hierarchies that could be held by any group of players in any type space. This formalism is used to study group belief invariant Bayes correlated equilibria; this is shown to be the minimal solution concept that only depends on group belief hierarchies and contains all Bayes Nash equilibria.

Suggested Citation

  • Benjamin Brooks & Songzi Du, 2026. "Group Beliefs," Working Papers 2026-127, Becker Friedman Institute for Research In Economics.
    • Handle: RePEc:bfi:wpaper:2026-127
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    Keywords

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    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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