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Professional Advice

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Author Info
Marco Ottaviani (University College London)
Peter Sorensen (University of Copenhagen)

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Abstract

Professional experts offer advice with the objective of appearing well informed. Their ability is evaluated on the basis of the advice given and the realized state of the world. We model this situation as a reputational cheap-talk game with continuous signal, state, and ability type spaces. Despite allowing a message space as rich as the signal space, at best two messages are sent in the most informative equilibrium. The expert can credibly transmit only the direction but not the intensity of the information possessed. Equilibrium forecasts are then systematically less precise than under truthtelling, and learning on the expert's ability is slow.

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Publisher Info
Paper provided by EconWPA in its series Game Theory and Information with number 9906003.

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Date of creation: 25 Jun 1999
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Handle: RePEc:wpa:wuwpga:9906003

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Related research
Keywords: reputation; cheap talk; forecasting; advice; herding;

Other versions of this item:

Find related papers by JEL classification:
D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Models of Political Processes: Rent-seeking, Elections, Legislatures, and Voting Behavior
D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information
D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search, Learning, and Information
G20 - Financial Economics - - Financial Institutions and Services - - - General
J30 - Labor and Demographic Economics - - Wages, Compensation, and Labor Costs - - - General

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

  1. Sobel, Joel, 1985. "A Theory of Credibility," Review of Economic Studies, Blackwell Publishing, vol. 52(4), pages 557-73, October. [Downloadable!] (restricted)
  2. Krishna, V. & Morgan, J., 1999. "A Model of Expertise," Papers 206, Princeton, Woodrow Wilson School - Public and International Affairs.
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  3. Abhijit Banerjee & Rohini Somanathan, 2001. "A Simple Model Of Voice," The Quarterly Journal of Economics, MIT Press, vol. 116(1), pages 189-227, February. [Downloadable!] (restricted)
  4. Scharfstein, David S & Stein, Jeremy C, 1990. "Herd Behavior and Investment," American Economic Review, American Economic Association, vol. 80(3), pages 465-79, June.
    Other versions:
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