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Longitudinal Analysis of Generic Substitution

  • Dag Morten Dalen
  • Marilena Locatelli
  • Steinar Strøm

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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File URL: http://www.cesifo-group.de/portal/page/portal/DocBase_Content/WP/WP-CESifo_Working_Papers/wp-cesifo-2010/wp-cesifo-2010-09/cesifo1_wp3176.pdf
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Paper provided by CESifo Group Munich in its series CESifo Working Paper Series with number 3176.

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Date of creation: 2010
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Handle: RePEc:ces:ceswps:_3176
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  1. Kenneth Train, 2003. "Discrete Choice Methods with Simulation," Online economics textbooks, SUNY-Oswego, Department of Economics, number emetr2.
  2. 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.
  3. 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, vol. 12(1), pages 49-59, February.
  4. Leif Andreassen & Maria Laura Di Tommaso & Steinar Strøm, 2012. "Do Medical Doctors Respond to Economic Incentives?," CESifo Working Paper Series 3802, CESifo Group Munich.
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