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Generic Competition in the US Pharmaceutical Industry

Author

Listed:
  • Atanu Saha
  • Henry Grabowski
  • Howard Birnbaum
  • Paul Greenberg
  • Oded Bizan

Abstract

We develop a simultaneous equations estimation framework to understand the interactions among generic entry, prices, and market shares. We base our estimates on a panel data sample of 40 brand-name drugs that first experienced generic competition during the period July 1992-January 1998. We find that generic share and price are simultaneously determined, while the number of generic entrants is a key determinant of generic market share and the generic-to-brand price ratio. In addition, we find generic competition to be particularly intense for blockbuster drugs, which experience significantly more generic entrants, price erosion, and generic penetration than other drugs.

Suggested Citation

  • Atanu Saha & Henry Grabowski & Howard Birnbaum & Paul Greenberg & Oded Bizan, 2006. "Generic Competition in the US Pharmaceutical Industry," International Journal of the Economics of Business, Taylor & Francis Journals, vol. 13(1), pages 15-38.
  • Handle: RePEc:taf:ijecbs:v:13:y:2006:i:1:p:15-38
    DOI: 10.1080/13571510500519905
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    References listed on IDEAS

    as
    1. Hudson, John, 2000. "Generic take-up in the pharmaceutical market following patent expiry: A multi-country study," International Review of Law and Economics, Elsevier, vol. 20(2), pages 205-221, June.
    2. Richard G. Frank & David S. Salkever, 1997. "Generic Entry and the Pricing of Pharmaceuticals," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 6(1), pages 75-90, March.
    3. Richard G. Frank & David S. Salkever, 1991. "Pricing, Patent Loss and the Market For Pharmaceuticals," NBER Working Papers 3803, National Bureau of Economic Research, Inc.
    4. Meir Statman, 1981. "The effect of patent expiration on the market position of drugs," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 2(2), pages 61-66, June.
    5. Geroski, P. A., 1995. "What do we know about entry?," International Journal of Industrial Organization, Elsevier, vol. 13(4), pages 421-440, December.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Generic Entry; Competition; JEL Classifications: I11; L11;

    JEL classification:

    • I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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