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Controlling Sellers Who Provide Advice: Regulation and Competition

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  • Pouyet, Jérôme
  • Martimort, David
  • Gromb, Denis
  • Bardey, David

Abstract

A monopoly seller advises buyers about which of two goods best fits their needs but may be tempted to steer buyers towards the higher margin good. For the seller to collect information about a buyer's needs and provide truthful advice, the profits from selling both goods must lie within an implementability cone. In the optimal regulation, pricing distortions and information-collection incentives are controlled separately by price regulation and fixed rewards respectively. This no longer holds when the seller has private information about costs as both problems interact. We study the extent to which competition and the threat by buyers to switch sellers can substitute for regulation.

Suggested Citation

  • Pouyet, Jérôme & Martimort, David & Gromb, Denis & Bardey, David, 2019. "Controlling Sellers Who Provide Advice: Regulation and Competition," CEPR Discussion Papers 13543, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:13543
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    Cited by:

    1. Yongmin Chen & Jianpei Li & Jin Zhang, 2022. "Efficient Liability In Expert Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 63(4), pages 1717-1744, November.
    2. Bertrand Crettez & Régis Deloche & Marie‐Hélène Jeanneret‐Crettez, 2020. "A demand‐induced overtreatment model with heterogeneous experts," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 22(5), pages 1713-1733, September.
    3. Marc Bourreau & Germain Gaudin, 2022. "Streaming platform and strategic recommendation bias," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 31(1), pages 25-47, February.

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    More about this item

    Keywords

    Mis-selling; Expertise; Regulation; Asymmetric information;
    All these keywords.

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L15 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Information and Product Quality
    • L51 - Industrial Organization - - Regulation and Industrial Policy - - - Economics of Regulation
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage

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