TY - JOUR AU - Kamenica,Emir AU - Gentzkow,Matthew TI - Bayesian Persuasion JF - National Bureau of Economic Research Working Paper Series VL - No. 15540 PY - 2009 Y2 - November 2009 UR - http://www.nber.org/papers/w15540 L1 - http://www.nber.org/papers/w15540.pdf N1 - Author contact info: Emir Kamenica University of Chicago Booth School of Business 5807 S. Woodlawn Ave. Chicago, IL 60637 Tel: 773.834.8690 E-Mail: emir.kamenica@chicagobooth.edu Matthew Gentzkow University of Chicago Booth School of Business 5807 South Woodlawn Avenue Chicago, IL 60637 Tel: 773/834-2177 Fax: 773/702-0458 E-Mail: gentzkow@chicagobooth.edu AB - When is it possible for one person to persuade another to change her action? We take a mechanism design approach to this question. Taking preferences and initial beliefs as given, we introduce the notion of a persuasion mechanism: a game between Sender and Receiver defined by an information structure and a message technology. We derive necessary and sufficient conditions for the existence of a persuasion mechanism that strictly benefits Sender. We characterize the optimal mechanism. Finally, we analyze several examples that illustrate the applicability of our results. ER -