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Informational Cascades Elicit Private Information

  • Olivier Gossner
  • Nicolas 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 truth-telling 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. Copyright 2006 by the Economics Department Of The University Of Pennsylvania And Osaka University Institute Of Social And Economic Research Association.

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File URL: http://www.blackwell-synergy.com/doi/abs/10.1111/j.1468-2354.2006.00380.x
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Article provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.

Volume (Year): 47 (2006)
Issue (Month): 1 (02)
Pages: 297-325

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Handle: RePEc:ier:iecrev:v:47:y:2006:i:1:p:297-325
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  1. 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.
  2. Farrell, Joseph & Gibbons, Robert, 1988. "Cheap Talk Can Matter in Bargaining," Department of Economics, Working Paper Series qt3qz786xq, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  3. Sandeep Baliga & Stephen Morris, 2000. "Coordination, Spillovers, and Cheap Talk," Discussion Papers 1301, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  4. Joseph Farrell, 1987. "Cheap Talk, Coordination, and Entry," RAND Journal of Economics, The RAND Corporation, vol. 18(1), pages 34-39, Spring.
  5. Zwiebel, Jeffrey, 1995. "Corporate Conservatism and Relative Compensation," Journal of Political Economy, University of Chicago Press, vol. 103(1), pages 1-25, February.
  6. 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.
  7. 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.
  8. 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.
  9. Crawford, Vincent P & Sobel, Joel, 1982. "Strategic Information Transmission," Econometrica, Econometric Society, vol. 50(6), pages 1431-51, November.
  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. Farrell, Joseph, 1988. "Communication, coordination and Nash equilibrium," Economics Letters, Elsevier, vol. 27(3), pages 209-214.
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