Consumption Externalities and Diffusion in Pharmaceutical Markets: Antiulcer Drugs
We examine the role of consumption externalities in the demand for pharmaceuticals at both the brand level and over a therapeutic class of drugs. These effects emerge when use of a drug by others affects its value, and/or conveys information abut efficacy and safety to patients and physicians. This can affect that rate of market diffusion for a new entrant, and can lead to herb behavior whereby a particular drug can dominate the market despite the availability of close substitutes. We use data for H2-antagonist antiulcer drugs to estimate a dynamic demand model and quantify these effects. The model has three components: an hedonic price equation that measures how the aggregate usage of a drug, as well as conventional attributes, affect brand valuation; equations relating equilibrium market shares to quality-adjusted prices and marketing levels; and diffusion equations describing the dynamic adjustment process. We find that consumption externalities influence both valuations and rates of diffusion, but that they operate at the brand and not the therapeutic class level.
|Date of creation:||Jun 2000|
|Date of revision:|
|Publication status:||published as Ernst R. Berndt & Robert S. Pindyck & Pierre Azoulay, 2003. "Consumption Externalities and Diffusion in Pharmaceutical Markets: Antiulcer Drugs," Journal of Industrial Economics, Blackwell Publishing, vol. 51(2), pages 243-270, 06.|
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- Scharfstein, David. & Stein, Jeremy C., 1988.
"Herd behavior and investment,"
WP 2062-88., Massachusetts Institute of Technology (MIT), Sloan School of Management.
- Ellison, S & Cockburn, I & Griliches, A & Hausman, J, 1996.
"Characteristics of Demand for Pharmaceutical Products : an Examination of four Cephalosporins,"
96-24, Massachusetts Institute of Technology (MIT), Department of Economics.
- Sara Ellison Fisher & Iain Cockburn & Zvi Griliches & Jerry Hausman, 1997. "Characteristics of Demand for Pharmaceutical Products: An Examination of Four Cephalosporins," RAND Journal of Economics, The RAND Corporation, vol. 28(3), pages 426-446, Autumn.
- Z. John Lu & William S. Comanor, 1998. "Strategic Pricing Of New Pharmaceuticals," The Review of Economics and Statistics, MIT Press, vol. 80(1), pages 108-118, February.
- Zvi Griliches, 1990.
"Patent Statistics as Economic Indicators: A Survey,"
NBER Working Papers
3301, National Bureau of Economic Research, Inc.
- Zvi Griliches, 1998. "Patent Statistics as Economic Indicators: A Survey," NBER Chapters, in: R&D and Productivity: The Econometric Evidence, pages 287-343 National Bureau of Economic Research, Inc.
- Griliches, Zvi, 1990. "Patent Statistics as Economic Indicators: A Survey," Journal of Economic Literature, American Economic Association, vol. 28(4), pages 1661-1707, December.
- Erik Brynjolfsson & Chris F. Kemerer, 1993.
"Network Externalities in Microcomputer Software: An Econometric Analysis of the Spreadsheet Market,"
Working Paper Series
158, MIT Center for Coordination Science.
- Erik Brynjolfsson & Chris F. Kemerer, 1996. "Network Externalities in Microcomputer Software: An Econometric Analysis of the Spreadsheet Market," Management Science, INFORMS, vol. 42(12), pages 1627-1647, December.
- Kessler, Daniel & McClellan, Mark, 1996. "Do Doctors Practice Defensive Medicine?," The Quarterly Journal of Economics, MIT Press, vol. 111(2), pages 353-90, May.
- repec:fth:harver:1473 is not listed on IDEAS
- Daniel P. Kessler & Mark McClellan, 1996. "Do Doctors Practice Defensive Medicine?," NBER Working Papers 5466, National Bureau of Economic Research, Inc.
- Iain M. Cockburn & Aslam H. Anis, 2001.
"Hedonic Analysis of Arthritis Drugs,"
in: Medical Care Output and Productivity, pages 439-462
National Bureau of Economic Research, Inc.
- Banerjee, Abhijit V, 1992. "A Simple Model of Herd Behavior," The Quarterly Journal of Economics, MIT Press, vol. 107(3), pages 797-817, August.
- Beggs, Alan & Klemperer, Paul, 1990.
"Multi-Period Competition with Switching Costs,"
CEPR Discussion Papers
436, C.E.P.R. Discussion Papers.
- Goolsbee, Austan & Klenow, Peter J, 2002.
"Evidence on Learning and Network Externalities in the Diffusion of Home Computers,"
Journal of Law and Economics,
University of Chicago Press, vol. 45(2), pages 317-43, October.
- Austan Goolsbee & Peter J. Klenow, 1999. "Evidence on Learning and Network Externalities in the Diffusion of Home Computers," NBER Working Papers 7329, National Bureau of Economic Research, Inc.
- Zvi Griliches, 1958. "Research Costs and Social Returns: Hybrid Corn and Related Innovations," Journal of Political Economy, University of Chicago Press, vol. 66, pages 419.
- McFadden, Daniel L., 1984. "Econometric analysis of qualitative response models," Handbook of Econometrics, in: Z. Griliches† & M. D. Intriligator (ed.), Handbook of Econometrics, edition 1, volume 2, chapter 24, pages 1395-1457 Elsevier.
- Paul David, 1997.
"Path Dependence and the Quest for Historical Economics: One More chorus of Ballad of QWERTY,"
Economics Series Working Papers
1997-W20, University of Oxford, Department of Economics.
- Paul A. David, 1997. "Path Dependence and the Quest for Historical Economics: One More chorus of Ballad of QWERTY," Oxford University Economic and Social History Series _020, Economics Group, Nuffield College, University of Oxford.
- Neil Gandal, 1994. "Hedonic Price Indexes for Spreadsheets and an Empirical Test for Network Externalities," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 160-170, Spring.
- Stanley M. Besen & Joseph Farrell, 1994. "Choosing How to Compete: Strategies and Tactics in Standardization," Journal of Economic Perspectives, American Economic Association, vol. 8(2), pages 117-131, Spring.
- Berry, Steven & Levinsohn, James & Pakes, Ariel, 1995. "Automobile Prices in Market Equilibrium," Econometrica, Econometric Society, vol. 63(4), pages 841-90, July.
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