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Cheap Talk Reputation and Coordination of Differentiated Experts

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  • In-Uck Park

    (University of Bristol)

Abstract

This paper examines the effectiveness of cheap talk advice in recurrent relationships between a customer, and multiple experts who provide professional services with differentiated specialties (e.g, auto mechanics, physicians). Specifically, the sustainable honesty level is characterized in relation to the degree of rivalry among the experts. The three main findings are: 1) Fully honest advice may not be sustained if the profitability of service provision varies widely across problems. 2) As the number of experts increases due to a higher degree of specialization, the maximum equilibrium honesty level deteriorates. 3) Nonetheless, the equilibria that pass a certain credibility check on their punishment phases, implement the same (unique) honesty level regardless of the number of experts. Furthermore, the customer can extract this honesty level by appointing a "panel" of only one or two (but no more) experts and "trusting" them all the time.

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Bibliographic Info

Paper provided by Econometric Society in its series Econometric Society World Congress 2000 Contributed Papers with number 1680.

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Date of creation: 01 Aug 2000
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Handle: RePEc:ecm:wc2000:1680

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  1. Vijay Krishna & John Morgan, 1999. "A Model of Expertise," Working Papers 154, Princeton University, Woodrow Wilson School of Public and International Affairs, Discussion Papers in Economics..
  2. Sobel, Joel, 1985. "A Theory of Credibility," Review of Economic Studies, Wiley Blackwell, vol. 52(4), pages 557-73, October.
  3. W. Pesendorfer & A. Wolinsky, 2000. "Second Opinions and Price Competition: Inefficiency in the Market for Expert Advice," Princeton Economic Theory Papers 00s18, Economics Department, Princeton University.
  4. Kreps, David M & Wilson, Robert, 1982. "Sequential Equilibria," Econometrica, Econometric Society, vol. 50(4), pages 863-94, July.
  5. Klein, Benjamin & Leffler, Keith B, 1981. "The Role of Market Forces in Assuring Contractual Performance," Journal of Political Economy, University of Chicago Press, vol. 89(4), pages 615-41, August.
  6. Shapiro, Carl, 1983. "Premiums for High Quality Products as Returns to Reputations," The Quarterly Journal of Economics, MIT Press, vol. 98(4), pages 659-79, November.
  7. Ottaviani, Marco & Sorensen, Peter Norman, 2006. "Professional advice," Journal of Economic Theory, Elsevier, vol. 126(1), pages 120-142, January.
  8. Park, In-Uck, 1997. "Generic Finiteness of Equilibrium Outcome Distributions for Sender-Receiver Cheap-Talk Games," Journal of Economic Theory, Elsevier, vol. 76(2), pages 431-448, October.
  9. 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.
  10. Benabou, R. & Laroque, G., 1989. "Using Privileged Information To Manipulate Markets: Insiders, Gurus, And Credibility," Working papers 513, Massachusetts Institute of Technology (MIT), Department of Economics.
  11. Blume, A., 1993. "Equilibrium Refinement in Sender-Receiver Games," Working Papers 93-06, University of Iowa, Department of Economics.
  12. Pitchik, Carolyn & Schotter, Andrew, 1987. "Honesty in a Model of Strategic Information Transmission," American Economic Review, American Economic Association, vol. 77(5), pages 1032-36, December.
  13. Ottaviani, Marco & Sorensen, Peter, 2001. "Information aggregation in debate: who should speak first?," Journal of Public Economics, Elsevier, vol. 81(3), pages 393-421, September.
  14. V. Crawford & J. Sobel, 2010. "Strategic Information Transmission," Levine's Working Paper Archive 544, David K. Levine.
  15. Taylor, Curtis R, 1995. "The Economics of Breakdowns, Checkups, and Cures," Journal of Political Economy, University of Chicago Press, vol. 103(1), pages 53-74, February.
  16. Darby, Michael R & Karni, Edi, 1973. "Free Competition and the Optimal Amount of Fraud," Journal of Law and Economics, University of Chicago Press, vol. 16(1), pages 67-88, April.
  17. Stephen Morris, 1998. "An Instrumental Theory of Political Correctness," Discussion Papers 1209, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  18. Bernheim, B. Douglas & Peleg, Bezalel & Whinston, Michael D., 1987. "Coalition-Proof Nash Equilibria I. Concepts," Journal of Economic Theory, Elsevier, vol. 42(1), pages 1-12, June.
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