Regulation of pharmaceutical prices : evidence from a reference price reform in Denmark

Reference price systems for prescription drugs constitute widely adopted cost containment tools. In these systems, patients co-pay a fraction of the difference between a drug's pharmacy retail price and a reference price that is set by the government. Reference prices are either determined externally (based on drug prices in other countries) or internally (based on domestic drug prices). We study the effects of a change from external to internal reference pricing in Denmark in 2005. The reform led to substantial reductions in retail prices, reference prices and consumer co-payments as well as to sizable decreases in overall producer revenues and health care expenditures. The reform induced consumers to substitute away from branded drugs for which we estimate strong preferences. Therefore, as long as we include the perceived differences between branded and generic drugs in our consumer welfare estimation, the increase in consumer welfare due to the reform is relatively small