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Informational cascades elicit private information

  • Olivier Gossner
  • Nicholas Melissas


We introduce cheap talk in a dynamic investment model with information externalities. We first show how social learning adversely affects the credibility of cheap talk messages. Next, we show how an informational cascade makes truthtelling incentive compatible. A separating equilibrium only exists for high surplus projects. Both an investment subsidy and an investment tax can increase welfare. The more precise the sender’s information, the higher her incentives to truthfully reveal her private information.

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Paper provided by Department of Economics, University of Leicester in its series Discussion Papers in Economics with number 03/6.

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Date of creation: Jun 2003
Date of revision:
Handle: RePEc:lec:leecon:03/6
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  1. Robert Gibbons & Joseph Farrell, 1988. "Cheap Talk Can Matter in Bargaining," Working papers 482, Massachusetts Institute of Technology (MIT), Department of Economics.
  2. Baliga, Sandeep & Morris, Stephen, 2002. "Co-ordination, Spillovers, and Cheap Talk," Journal of Economic Theory, Elsevier, vol. 105(2), pages 450-468, August.
  3. Olivier Gossner & Nicolas Melissas, 2006. "Informational Cascades Elicit Private Information ," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 47(1), pages 297-325, 02.
  4. Gill, D. & Sgroi, D., 2003. "Product Launches with Biased Reviewers: The Importance of Not Being Earnest," Cambridge Working Papers in Economics 0334, Faculty of Economics, University of Cambridge.
  5. Sgroi, Daniel, 2002. "Optimizing Information in the Herd: Guinea Pigs, Profits, and Welfare," Games and Economic Behavior, Elsevier, vol. 39(1), pages 137-166, April.
  6. Sushil Bikhchandani & David Hirshleifer & Ivo Welch, 2010. "A theory of Fads, Fashion, Custom and cultural change as informational Cascades," Levine's Working Paper Archive 1193, David K. Levine.
  7. Crawford, Vincent P & Sobel, Joel, 1982. "Strategic Information Transmission," Econometrica, Econometric Society, vol. 50(6), pages 1431-51, November.
  8. Joseph Farrell, 1987. "Cheap Talk, Coordination, and Entry," RAND Journal of Economics, The RAND Corporation, vol. 18(1), pages 34-39, Spring.
  9. Farrell, Joseph, 1988. "Communication, coordination and Nash equilibrium," Economics Letters, Elsevier, vol. 27(3), pages 209-214.
  10. Chamley, Christophe, 2004. "Delays and equilibria with large and small information in social learning," European Economic Review, Elsevier, vol. 48(3), pages 477-501, June.
  11. Zwiebel, Jeffrey, 1995. "Corporate Conservatism and Relative Compensation," Journal of Political Economy, University of Chicago Press, vol. 103(1), pages 1-25, February.
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