Vaccine Supply: Effects of Regulation and Competition
Patricia Danzon, Nuno Sousa Pereira
International Journal of the Economics of Business, vol. 18, 2011, p. 239-271.

Productivity in Pharmaceutical-Biotechnology R&D: The Role of Experience and Alliances
Patricia Danzon, Sean Nicholson, Nuno Sousa Pereira
Journal Of Health Economics, vol. 24, 2005, p. 317-339.