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Sweet Talk: A Theory of Persuasion

  • Di Maggio, Marco

This paper introduces a model of sweet talk in which a seller may acquire verifiable information and selectively disclose it to a buyer to negotiate a deal. We start by analyzing a model with common priors in which the seller generates information for two reasons: a trading motive and a profit motive that is, to make trade possible or to increase the gains from it. There exists a negotiation region in which the seller continues to reveal information even if trading is already profitable. We extend the model, allowing for different prior beliefs about the value of the object, arguing that a complementarity between the seller's confidence and the precision of his information endogenously arises. Appointing an optimistic salesman may be costly because he may destroy profitable trading opportunities. We also allow the seller to choose in which market to trade: a matching market with a fixed price or a haggling market. Our model also provides a testable difference between a model of trading with homogenous priors and one with heterogeneous priors and finds application in understanding contracts as reference points.

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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 18697.

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Date of creation: 15 Nov 2009
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Handle: RePEc:pra:mprapa:18697
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  1. Oliver Hart & John Moore, 2008. "Contracts as Reference Points," The Quarterly Journal of Economics, Oxford University Press, vol. 123(1), pages 1-48.
  2. H.S. Shin, 1994. "News Management and the Value of Firms," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 58-71, Spring.
  3. Brad M. Barber & Terrance Odean, 2001. "Boys will be Boys: Gender, Overconfidence, and Common Stock Investment," The Quarterly Journal of Economics, Oxford University Press, vol. 116(1), pages 261-292.
  4. Markus Glaser & Martin Weber, 1990. "Overconfidence and trading volume," The Geneva Risk and Insurance Review, Palgrave Macmillan;International Association for the Study of Insurance Economics (The Geneva Association), vol. 32(1), pages 1-36, January.
  5. Paul Milgrom, 2007. "What the Seller Won’t Tell You: Persuasion and Disclosure in Markets," Levine's Bibliography 843644000000000045, UCLA Department of Economics.
  6. B. Douglas Bernheim & Michael D. Whinston, 1997. "Incomplete Contracts and Strategic Ambiguity," Harvard Institute of Economic Research Working Papers 1787, Harvard - Institute of Economic Research.
  7. Harris, Milton & Raviv, Artur, 1993. "Differences of Opinion Make a Horse Race," Review of Financial Studies, Society for Financial Studies, vol. 6(3), pages 473-506.
  8. Eric Van den Steen, 2010. "Disagreement and the Allocation of Control," Journal of Law, Economics and Organization, Oxford University Press, vol. 26(2), pages 385-426.
  9. 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.
  10. Jean Tirole & Roland Benabou, 2004. "Belief in a Just World and Redistributive Politics," 2004 Meeting Papers 15, Society for Economic Dynamics.
  11. Hyun Song Shin, 2001. "Disclosures and asset returns," LSE Research Online Documents on Economics 25044, London School of Economics and Political Science, LSE Library.
  12. Kultti, K.K., 1997. "Equivalence of Auctions and Posted Prices," Discussion Paper 1997-57, Tilburg University, Center for Economic Research.
  13. Paul R. Milgrom & John Roberts, 1985. "Relying on the Information of Interested Parties," Cowles Foundation Discussion Papers 749, Cowles Foundation for Research in Economics, Yale University.
  14. Van den Steen, Eric, 2007. "The Limits of Authority: Motivation versus Coordination," Working papers 37305, Massachusetts Institute of Technology (MIT), Sloan School of Management.
  15. Wang, Ruqu, 1993. "Auctions versus Posted-Price Selling," American Economic Review, American Economic Association, vol. 83(4), pages 838-51, September.
  16. Abhijit Banerjee & Rohini Somanathan, 2001. "A Simple Model of Voice," The Quarterly Journal of Economics, Oxford University Press, vol. 116(1), pages 189-227.
  17. Lipman Barton L. & Seppi Duane J., 1995. "Robust Inference in Communication Games with Partial Provability," Journal of Economic Theory, Elsevier, vol. 66(2), pages 370-405, August.
  18. 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.
  19. Roland Bénabou, 2008. "Joseph Schumpeter Lecture Ideology," Journal of the European Economic Association, MIT Press, vol. 6(2-3), pages 321-352, 04-05.
  20. Kfir Eliaz & Ran Spiegler, 2006. "Contracting with Diversely Naive Agents," Review of Economic Studies, Oxford University Press, vol. 73(3), pages 689-714.
  21. Rubinstein, Ariel & Glazer, Jacob, 2006. "A study in the pragmatics of persuasion: a game theoretical approach," Theoretical Economics, Econometric Society, vol. 1(4), pages 395-410, December.
  22. Morris, Stephen, 1994. "Trade with Heterogeneous Prior Beliefs and Asymmetric Information," Econometrica, Econometric Society, vol. 62(6), pages 1327-47, November.
  23. J. Michael Harrison & David M. Kreps, 1978. "Speculative Investor Behavior in a Stock Market with Heterogeneous Expectations," The Quarterly Journal of Economics, Oxford University Press, vol. 92(2), pages 323-336.
  24. Van den Steen, Eric, 2005. "On the Origin of Shared Beliefs (and Corporate Culture)," Working papers 27855, Massachusetts Institute of Technology (MIT), Sloan School of Management.
  25. Michael Peters & Sergei Severinov, 1995. "Competition Among Sellers who offer Auctions Instead of Prices," Working Papers peters-95-02, University of Toronto, Department of Economics.
  26. Yeon-Koo Che & Navin Kartik, 2009. "Opinions as Incentives," Journal of Political Economy, University of Chicago Press, vol. 117(5), pages 815-860, October.
  27. Jacob Glazer & Ariel Rubinstein, 2004. "On Optimal Rules of Persuasion," Econometrica, Econometric Society, vol. 72(6), pages 1715-1736, November.
  28. Verrecchia, Robert E., 1983. "Discretionary disclosure," Journal of Accounting and Economics, Elsevier, vol. 5(1), pages 179-194, April.
  29. John C. Harsanyi, 1968. "Games with Incomplete Information Played by `Bayesian' Players, Part III. The Basic Probability Distribution of the Game," Management Science, INFORMS, vol. 14(7), pages 486-502, March.
  30. Van den Steen, Eric, 2005. "Too Motivated?," Working papers 18180, Massachusetts Institute of Technology (MIT), Sloan School of Management.
  31. Harrington, Joseph E, Jr, 1993. "Economic Policy, Economic Performance, and Elections," American Economic Review, American Economic Association, vol. 83(1), pages 27-42, March.
  32. Wang, Ruqu, 1995. "Bargaining versus posted-price selling," European Economic Review, Elsevier, vol. 39(9), pages 1747-1764, December.
  33. Steven Shavell, 1994. "Acquisition and Disclosure of Information Prior to Sale," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 20-36, Spring.
  34. Stephen Morris, 1997. "Risk, uncertainty and hidden information," Theory and Decision, Springer, vol. 42(3), pages 235-269, May.
  35. Morris, Stephen, 1995. "The Common Prior Assumption in Economic Theory," Economics and Philosophy, Cambridge University Press, vol. 11(02), pages 227-253, October.
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