NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Pharmaceutical Followers

Peter Arcidiacono, Paul B. Ellickson, Peter Landry, David B. Ridley

NBER Working Paper No. 19522
Issued in October 2013

---- Acknowledgements -----

Michael Anderson provided excellent research assistance. We are grateful for helpful comments from Yair Taylor and seminar participants at Duke University and University of Massachusetts-Amherst. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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