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Longitudinal analysis of generic substitution

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Abstract

Using an extensive longitudinal dataset extracted from the Norwegian Prescription Database (NorPD) containing all prescriptions written in the period January 2004 to June 2007, we selected two particular drugs (chemical substances) used against cholesterol. The two brand-name products on the Norwegian markets were Provachol (atc code C10AA03) and Zocor (atc code C10AA01). The generics are Provastatine and Simastatine. The model accounts for taste persistence and is estimated on panel data. We find that prices have a negative impact on transitions in the sense that an increase in the brand price will reduce the transition from generics to brand and likewise an increase in the generic price will reduce the transition from brand to generics.

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  • Dalen Dag Morten & Strom Steinar & Locatelli Marilena, 2010. "Longitudinal analysis of generic substitution," Department of Economics and Statistics Cognetti de Martiis. Working Papers 201013, University of Turin.
    • Handle: RePEc:uto:dipeco:201013
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    1. Dag Dalen & Kari Furu & Marilena Locatelli & Steinar Strøm, 2011. "Generic substitution: micro evidence from register data in Norway," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 12(1), pages 49-59, February.
    2. Train,Kenneth E., 2009. "Discrete Choice Methods with Simulation," Cambridge Books, Cambridge University Press, number 9780521766555.
    3. John K. Dagsvik, 2002. "Discrete Choice in Continuous Time: Implications of an Intertemporal Version of the Iia Property," Econometrica, Econometric Society, vol. 70(2), pages 817-831, March.
    4. Andreassen, Leif & Di Tommaso, Maria Laura & Strøm, Steinar, 2013. "Do medical doctors respond to economic incentives?," Journal of Health Economics, Elsevier, vol. 32(2), pages 392-409.
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    Cited by:

    1. Elsayyad, May & Konrad, Kai A., 2012. "Fighting multiple tax havens," Journal of International Economics, Elsevier, vol. 86(2), pages 295-305.

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    More about this item

    JEL classification:

    • C35 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health
    • L65 - Industrial Organization - - Industry Studies: Manufacturing - - - Chemicals; Rubber; Drugs; Biotechnology; Plastics

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