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Controlling Sellers Who Provide Advice: Regulation and Competition

Author

Listed:
  • David Bardey

    (University of Los Andes)

  • Denis Gromb

    (HEC Paris - Ecole des Hautes Etudes Commerciales)

  • David Martimort

    (PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, PJSE - Paris Jourdan Sciences Economiques - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

  • Jérôme Pouyet

    (THEMA - Théorie économique, modélisation et applications - CNRS - Centre National de la Recherche Scientifique - CY - CY Cergy Paris Université, ESSEC Business School)

Abstract

A monopoly seller advising buyers about which of two goods fits their needs may be tempted to recommend 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 be similar enough, i.e., within an implementability cone. The optimal regulation controls pricing distortions and information‐collection incentives separately via price regulation and fixed rewards respectively. This no longer holds when the seller has private information about costs as both problems interact. We study whether competition and the threat by buyers to switch sellers can substitute for regulation.

Suggested Citation

  • David Bardey & Denis Gromb & David Martimort & Jérôme Pouyet, 2020. "Controlling Sellers Who Provide Advice: Regulation and Competition," PSE-Ecole d'économie de Paris (Postprint) halshs-02973307, HAL.
    • Handle: RePEc:hal:pseptp:halshs-02973307
    DOI: 10.1111/joie.12228
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    as
    1. Fahad Khalil, 1997. "Auditing Without Commitment," RAND Journal of Economics, The RAND Corporation, vol. 28(4), pages 629-640, Winter.
    2. Yuk-fai Fong, 2005. "When Do Experts Cheat and Whom Do They Target?," RAND Journal of Economics, The RAND Corporation, vol. 36(1), pages 113-130, Spring.
    3. Pierre Dubois & Morten Sæthre, 2020. "On the Effect of Parallel Trade on Manufacturers' and Retailers' Profits in the Pharmaceutical Sector," Econometrica, Econometric Society, vol. 88(6), pages 2503-2545, November.
    4. Manolis Galenianos & Alessandro Gavazza, 2017. "A Structural Model of the Retail Market for Illicit Drugs," American Economic Review, American Economic Association, vol. 107(3), pages 858-896, March.
    5. Simona Grassi & Ching-to Albert Ma, 2016. "Information acquisition, referral, and organization," RAND Journal of Economics, RAND Corporation, vol. 47(4), pages 935-960, November.
    6. Richard A. Lambert, 1986. "Executive Effort and Selection of Risky Projects," RAND Journal of Economics, The RAND Corporation, vol. 17(1), pages 77-88, Spring.
    7. Malcomson James M, 2009. "Principal and Expert Agent," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 9(1), pages 1-36, May.
    8. Nelson, Phillip, 1970. "Information and Consumer Behavior," Journal of Political Economy, University of Chicago Press, vol. 78(2), pages 311-329, March-Apr.
    9. Inderst, Roman & Ottaviani, Marco, 2012. "How (not) to pay for advice: A framework for consumer financial protection," Journal of Financial Economics, Elsevier, vol. 105(2), pages 393-411.
    10. Emons, Winand, 2001. "Credence goods monopolists," International Journal of Industrial Organization, Elsevier, vol. 19(3-4), pages 375-389, March.
    11. Andres Zambrano, 2019. "Motivating informed decisions," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 67(3), pages 645-664, April.
    12. Mathis, Jérôme & McAndrews, James & Rochet, Jean-Charles, 2009. "Rating the raters: Are reputation concerns powerful enough to discipline rating agencies?," Journal of Monetary Economics, Elsevier, vol. 56(5), pages 657-674, July.
    13. 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.
    14. Marie Allard & Pierre Thomas Léger & Lise Rochaix, 2009. "Provider Competition in a Dynamic Setting," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 18(2), pages 457-486, June.
    15. Simon Board & Moritz Meyer‐ter‐Vehn, 2013. "Reputation for Quality," Econometrica, Econometric Society, vol. 81(6), pages 2381-2462, November.
    16. Gromb, Denis & Martimort, David, 2007. "Collusion and the organization of delegated expertise," Journal of Economic Theory, Elsevier, vol. 137(1), pages 271-299, November.
    17. Roman Inderst & Marco Ottaviani, 2009. "Misselling through Agents," American Economic Review, American Economic Association, vol. 99(3), pages 883-908, June.
    18. Roman Inderst & Marco Ottaviani, 2013. "Sales Talk, Cancellation Terms and the Role of Consumer Protection," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 80(3), pages 1002-1026.
    19. Winand Emons, 2000. "Product Differentiation and Price Competition Between a Safe and a Risky Seller," Journal of Institutional and Theoretical Economics (JITE), Mohr Siebeck, Tübingen, vol. 156(3), pages 431-431, September.
    20. Antoine Faure‐Grimaud & Eloïc Peyrache & Lucía Quesada, 2009. "The ownership of ratings," RAND Journal of Economics, RAND Corporation, vol. 40(2), pages 234-257, June.
    21. Winand Emons, 1997. "Credence Goods and Fraudelent Experts," RAND Journal of Economics, The RAND Corporation, vol. 28(1), pages 107-119, Spring.
    22. Asher Wolinsky, 1993. "Competition in a Market for Informed Experts' Services," RAND Journal of Economics, The RAND Corporation, vol. 24(3), pages 380-398, Autumn.
    23. Dulleck, Uwe & Kerschbamer, Rudolf, 2009. "Experts vs. discounters: Consumer free-riding and experts withholding advice in markets for credence goods," International Journal of Industrial Organization, Elsevier, vol. 27(1), pages 15-23, January.
    24. Mylovanov, Timofiy & Troger, Thomas E., 2012. "Informed principal problems in generalized private values environments," Theoretical Economics, Econometric Society, vol. 7(3), September.
    25. Roman Inderst & Marco Ottaviani, 2012. "Financial Advice," Journal of Economic Literature, American Economic Association, vol. 50(2), pages 494-512, June.
    26. John Ferejohn, 1986. "Incumbent performance and electoral control," Public Choice, Springer, vol. 50(1), pages 5-25, January.
    27. Li, Sanxi & Peitz, Martin & Zhao, Xiaojian, 2016. "Information disclosure and consumer awareness," Journal of Economic Behavior & Organization, Elsevier, vol. 128(C), pages 209-230.
    28. Ingela Alger & François Salanié, 2006. "A Theory of Fraud and Overtreatment in Experts Markets," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 15(4), pages 853-881, December.
    29. 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.
    30. Iversen, Tor & Lurås, Hilde, 2011. "Patient switching in general practice," Journal of Health Economics, Elsevier, vol. 30(5), pages 894-903.
    31. Kfir Eliaz & Ran Spiegler, 2011. "Consideration Sets and Competitive Marketing," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 78(1), pages 235-262.
    32. Toshiaki Iizuka, 2012. "Physician Agency and Adoption of Generic Pharmaceuticals," American Economic Review, American Economic Association, vol. 102(6), pages 2826-2858, October.
    33. Alexander Frankel & Michael Schwarz, 2014. "Experts And Their Records," Economic Inquiry, Western Economic Association International, vol. 52(1), pages 56-71, January.
    34. Alan T. Sorensen, 2000. "Equilibrium Price Dispersion in Retail Markets for Prescription Drugs," Journal of Political Economy, University of Chicago Press, vol. 108(4), pages 833-862, August.
    35. Bouckaert, Jan & Degryse, Hans, 2000. "Price competition between an expert and a non-expert," International Journal of Industrial Organization, Elsevier, vol. 18(6), pages 901-923, August.
    36. Oliver Board, 2009. "Competition And Disclosure," Journal of Industrial Economics, Wiley Blackwell, vol. 57(1), pages 197-213, March.
    37. A. J. Culyer & J. P. Newhouse (ed.), 2000. "Handbook of Health Economics," Handbook of Health Economics, Elsevier, edition 1, volume 1, number 1.
    38. Wolfgang Pesendorfer & Asher Wolinsky, 2003. "Second Opinions and Price Competition: Inefficiency in the Market for Expert Advice," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 70(2), pages 417-437.
    39. Henry S. Schneider, 2012. "Agency Problems and Reputation in Expert Services: Evidence from Auto Repair," Journal of Industrial Economics, Wiley Blackwell, vol. 60(3), pages 406-433, September.
    40. Myerson, Roger B., 1982. "Optimal coordination mechanisms in generalized principal-agent problems," Journal of Mathematical Economics, Elsevier, vol. 10(1), pages 67-81, June.
    41. Manolis Galenianos & Alessandro Gavazza, 2017. "A Structural Model of the Retail Market for Illicit Drugs," American Economic Review, American Economic Association, vol. 107(3), pages 858-896, March.
    42. Chade, Hector & Kovrijnykh, Natalia, 2016. "Delegated information acquisition with moral hazard," Journal of Economic Theory, Elsevier, vol. 162(C), pages 55-92.
    43. Luis Garicano & Tano Santos, 2004. "Referrals," American Economic Review, American Economic Association, vol. 94(3), pages 499-525, June.
    44. Pitchik, Carolyn & Schotter, Andrew, 1987. "Honesty in a Model of Strategic Information Transmission," American Economic Review, American Economic Association, vol. 77(5), pages 1032-1036, December.
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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

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage
    • 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

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