Global Collaborative Patents
---- Acknowledgements ----
Comments are appreciated and can be sent to email@example.com and firstname.lastname@example.org. We thank seminar participants and two anonymous referees for very helpful comments. This research is generously supported by the Alfred Sloan Foundation, the Kauffman Foundation, the National Science Foundation, and Harvard Business School. William Kerr is a Research Associate of the Bank of Finland and thanks the Bank for hosting him during a portion of this project. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.