1. Opening the black box of innovation;Aghion;European Economic Review,1994
2. Discrete Choice Theory of Product Differentiation;Anderson,1992
3. Economic Growth;Barro,1995
4. The Impact of Incremental Innovation in Biopharmaceuticals: Drug Utilization in Original and Supplemental Indications;Berndt,2006
5. Reference pricing of pharmaceuticals;Brekke;Journal of Health Economics,2007