Generic substitution

Lenke til artikkel:



Dalen, Dag Morten, Kari Furu, Marilena Locatelli and Steinar Strøm




Nummer i serie: 11

Sammendrag (engelsk)

We examine the importance of prices, doctor and patient characteristics, and market institutions for the likelihood of choosing generic drugs instead of the more expensive original brand-name version. Using an extensive dataset extracted from The Norwegian Prescription Database (NorPD) containing all prescriptions written in March 2004 and 2006 on 23 different drugs (chemical substances) in Norway, we find strong evidence for the importance of both doctor and patient characteristics for the choice probabilities. The price difference between brand and generic versions and insurance coverage both affect generic substitution. Moreover, controlling for the retail chain affiliation of the dispensing pharmacy, we find that pharmacies play an important role for patients’ willingness to substitute. In markets with more recent entry of generic drugs, the brand-name loyalty proves to be much stronger, giving less explanatory power to our demand model.


Generics, substitution, microdata, random utility model


C35, I 18, L 65

Prosjekt info:

Oppdragsgiver: Norges forskningsråd
Oppdragsgivers prosjektnr.:
Frisch prosjekt: 4111 - Government financing of drug consumption in Norway and the markets for pharmaceuticals


Norwegian Research Council