Patent Citation Data in Social Science Research: Overview and Best Practices
---- Acknowledgments ----
We thank David Schwartz for suggesting this project. We received helpful comments from Bronwyn Hall, Dietmar Harhoff, Sadao Nagaoka, and Beth Webster, as well as participants at the 2015 Workshop on the Economics of Intellectual Property in Northwestern University. Jan Kozak provided valuable research assistance. The authors are solely responsible for all opinions or errors. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.