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Review of Economic Studies Vol. 84 No. 1 2017

Competition in Persuasion

Matthew Gentzkow1; Emir Kamenica2

1 Stanford University · 2 University of Chicago

open access

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.

DOI
10.1093/restud/rdw052
Volume
84
Issue
1
Pages
300-322
Language
en
Sources
bibtex:phds-export.bib openalex crossref

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