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Competition in Persuasion

Author

Listed:
  • Matthew Gentzkow
  • Emir Kamenica

Abstract

We study symmetric information games where a number of senders choose what information to communicate. We show that the impact of competition on information revelation is ambiguous in general. We identify a condition on the information environment (i.e. the set of signals available to each sender) that is necessary and sufficient for equilibrium outcomes to be no less informative than the collusive outcome, regardless of preferences. The same condition also provides an easy way to characterize the equilibrium set and governs whether introducing additional senders or decreasing the alignment of senders' preferences necessarily increases the amount of information revealed.

Suggested Citation

  • Matthew Gentzkow & Emir Kamenica, 2017. "Competition in Persuasion," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 84(1), pages 300-322.
    • Handle: RePEc:oup:restud:v:84:y:2017:i:1:p:300-322.
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    File URL: http://hdl.handle.net/10.1093/restud/rdw052
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    More about this item

    Keywords

    Communication; Collusion; Information revelation;
    All these keywords.

    JEL classification:

    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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