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Competition in Persuasion

  • Matthew Gentzkow
  • Emir Kamenica

We study the impact of competition on information revelation in a class of Bayesian Persuasion games with multiple senders. Senders with no private information choose what information to gather and communicate to a receiver who takes a non-contractible action that affects the welfare of all players. The space of available signals includes all possible conditional distributions and allows any sender to choose a signal that is arbitrarily correlated with signals of others. We characterize the information revealed in pure-strategy equilibria, and show that greater competition tends to increase the amount of information revealed.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 17436.

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Date of creation: Sep 2011
Date of revision:
Handle: RePEc:nbr:nberwo:17436
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  1. Brocas, Isabelle & Carrillo, Juan D & Palfrey, Thomas R, 2009. "Information Gatekeepers: Theory and Experimental Evidence," CEPR Discussion Papers 7457, C.E.P.R. Discussion Papers.
  2. Paul Milgrom & John Roberts, 1986. "Relying on the Information of Interested Parties," RAND Journal of Economics, The RAND Corporation, vol. 17(1), pages 18-32, Spring.
  3. Milgrom, P. & Shannon, C., 1991. "Monotone Comparative Statics," Papers 11, Stanford - Institute for Thoretical Economics.
  4. Marco Battaglini, 2002. "Multiple Referrals and Multidimensional Cheap Talk," Econometrica, Econometric Society, vol. 70(4), pages 1379-1401, July.
  5. Leland, Hayne E, 1981. "The Informational Role of Warranties and Private Disclosure about Product Quality: Comment," Journal of Law and Economics, University of Chicago Press, vol. 24(3), pages 485-89, December.
  6. Grossman, Sanford J, 1981. "The Informational Role of Warranties and Private Disclosure about Product Quality," Journal of Law and Economics, University of Chicago Press, vol. 24(3), pages 461-83, December.
  7. Martimort, David & Stole, Lars, 2011. "Aggregate Representations of Aggregate Games," MPRA Paper 32871, University Library of Munich, Germany.
  8. Paul R. Milgrom, 1979. "Good Nevs and Bad News: Representation Theorems and Applications," Discussion Papers 407R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
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