NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Lens or Prism? Patent Citations as a Measure of Knowledge Flows from Public Research

Michael Roach, Wesley M. Cohen

NBER Working Paper No. 18292
Issued in August 2012

---- Acknowledgements -----

Please cite as: Roach, M., W. M. Cohen. 2012. “Lens or Prism? Patent Citations as a Measure of Knowledge Flows from Public Research.” Management Science. Forthcoming. We would like to thank Jim Adams, Ajay Agrawal, Juan Alcacer, Ashish Arora, Sharon Belenzon, Lee Branstetter, Ronnie Chatterji, Marco Ceccagnoli, Iain Cockburn, Lee Fleming, Steven Klepper, Mike Lenox, Megan MacGarvie, Sangsoo Park, Bhaven Sampat, and Jerry Thursby for their valuable discussions and insights, as well as seminar participants at Duke University, the Georgia Institute of Technology, Harvard Business School, the National Bureau of Economic Research, and the University of North Carolina. We especially thank: Ashish Arora for suggestions for refining our model; Bhaven Sampat for graciously providing us with access to patent examiner data; and helpful comments and suggestions from the Associate Editor and three anonymous referees. All errors are our own. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. Wesley Cohen also thanks the Fuqua School of Business, Duke University, for research support.

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