David Blaine Ridley

David Blaine Ridley

Professor of the Practice of Economics

External Address: 
100 Fuqua Drive, Durham, NC 27708-0120
Internal Office Address: 
Duke Box 90120, 100 Fuqua Drive, Durham, NC 27708-0120
(919) 660-3784

David Ridley is the Dr. and Mrs. Frank A. Riddick Professor of the Practice of Business. He is also the Faculty Director of Duke's Health Sector Management program. In his research, David examines innovation and pricing in health care. David was the lead author of the paper proposing the priority review voucher program which became law. Voucher sales total more than a billion dollars and the program has encouraged development of many drugs for neglected and rare diseases. David's research appears in economics journals (Journal of Public Economics), medical journals (Journal of the American Medical Association), and scientific journals (Nature Reviews Drug Discovery). He is the principal investigator on a grant from the Gates Foundation for 2018 to 2020. He received a PhD in economics from Duke University in 2001.


  • Ph.D., Duke University 2001
  • M.A., Duke University 1995
  • B.A., University of Missouri at Columbia 1993

Ridley, David B., Xiaoshu Bei, and Eli B. Liebman. “No Shot: US Vaccine Prices And Shortages..” Health Affairs (Project Hope) 35, no. 2 (February 2016): 235–41. https://doi.org/10.1377/hlthaff.2015.0420. Full Text

Regnier, Stephane A., and David B. Ridley. “Market watch: Forecasting market share in the US pharmaceutical market..” Nature Reviews. Drug Discovery 14, no. 9 (September 2015): 594–95. https://doi.org/10.1038/nrd4697. Full Text

Regnier, Stephane Alexandre, and David B. Ridley. “Forecasting Market Share in the US Pharmaceutical Market.” Nature Reviews Drug Discovery. 2015. 14, no. 9 (July 31, 2015).

Arcidiacono, P., P. B. Ellickson, P. Landry, and D. B. Ridley. “Pharmaceutical followers.” International Journal of Industrial Organization 31, no. 5 (November 15, 2013): 538–53. https://doi.org/10.1016/j.ijindorg.2013.10.005. Full Text

Arcidiacono, Peter, Paul B. Ellickson, Peter Landry, and David B. Ridley. “Pharmaceutical Followers,” October 2013.

Gans, J. S., and D. B. Ridley. “Innovation incentives under transferable fast-track regulatory review.” Journal of Industrial Economics 61, no. 3 (September 1, 2013): 789–816. https://doi.org/10.1111/joie.12026. Full Text

Ridley, D. B. “Payments, promotion, and the purple pill.” Health Economics (United Kingdom), 2013. https://doi.org/10.1002/hec.3005. Full Text

Ridley, David B., and Alfonso Calles Sánchez. “Introduction of European priority review vouchers to encourage development of new medicines for neglected diseases..” Lancet 376, no. 9744 (September 11, 2010): 922–27. https://doi.org/10.1016/S0140-6736(10)60669-1. Full Text

Picone, G. A., D. B. Ridley, and P. A. Zandbergen. “Distance decreases with differentiation: Strategic agglomeration by retailers.” International Journal of Industrial Organization 27, no. 3 (May 1, 2009): 463–73. https://doi.org/10.1016/j.ijindorg.2008.11.007. Full Text

Moe, Jeffrey, Henry Grabowski, and David Ridley. “FDA review vouchers..” The New England Journal of Medicine 360, no. 8 (February 2009). https://doi.org/10.1056/nejmc086492. Full Text