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Market definition in the pharmaceutical industry: a case of drugs hopping antitrust markets?

Author

Listed:
  • Castanheira, Micael
  • Ornaghi, Carmine
  • Siotis, Georges

Abstract

Delineating the boundaries of the relevant market plays a central role in the conduct of competition policy. In this paper, we focus on market definition in the pharmaceutical industry, where the introduction of generics represents a significant competitive shock for the molecule experiencing Loss of Exclusivity. We show that generic entry generates market-wide effects that shift the boundaries of the relevant antitrust market, but in unexpected ways. In a market where non-price competition is prevalent, entry may lead to a split of the (initial) relevant market. Hence, and paradoxically, entry may soften competitive constraints. We also highlight the importance of properly accounting for non-price instruments: ignoring them can easily lead to a flawed definition of the relevant antitrust market. We obtain these results by econometrically estimating time-varying substitution patterns in the pharmaceutical industry.

Suggested Citation

  • Castanheira, Micael & Ornaghi, Carmine & Siotis, Georges, 2019. "Market definition in the pharmaceutical industry: a case of drugs hopping antitrust markets?," CEPR Discussion Papers 14035, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:14035
    as

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    References listed on IDEAS

    as
    1. de Frutos, Maria-Angeles & Ornaghi, Carmine & Siotis, Georges, 2013. "Competition in the pharmaceutical industry: How do quality differences shape advertising strategies?," Journal of Health Economics, Elsevier, vol. 32(1), pages 268-285.
    2. Panle Jia & Pinelopi K. Goldberg & Shubham Chaudhuri, 2006. "Estimating the Effects of Global Patent Protection in Pharmaceuticals: A Case Study of Quinolones in India," American Economic Review, American Economic Association, vol. 96(5), pages 1477-1514, December.
    3. Ernst R. Berndt, 2002. "Pharmaceuticals in U.S. Health Care: Determinants of Quantity and Price," Journal of Economic Perspectives, American Economic Association, vol. 16(4), pages 45-66, Fall.
    4. Castanheira, Micael & Ornaghi, Carmine & Siotis, Georges, 2019. "The unexpected consequences of generic entry," Journal of Health Economics, Elsevier, vol. 68(C).
    5. Castanheira, Micael & de Frutos, Maria-Angeles & Ornaghi, Carmine & Siotis, Georges, 2017. "The Unexpected Consequences of Asymmetric Competition. An Application to Big Pharma," CEPR Discussion Papers 11813, C.E.P.R. Discussion Papers.
    6. Rizzo, John A, 1999. "Advertising and Competition in the Ethical Pharmaceutical Industry: The Case of Antihypertensive Drugs," Journal of Law and Economics, University of Chicago Press, vol. 42(1), pages 89-116, April.
    7. Ivaldi Marc & Lőrincz Szabolcs, 2011. "Implementing Relevant Market Tests in Antitrust Policy: Application to Computer Servers," Review of Law & Economics, De Gruyter, vol. 7(1), pages 29-71, April.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Antitrust; competition policy; Market Definition; Pharmaceutical industry;

    JEL classification:

    • D22 - Microeconomics - - Production and Organizations - - - Firm Behavior: Empirical Analysis
    • I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
    • L22 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Firm Organization and Market Structure

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