NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

The Impact of Uncertain Intellectual Property Rights on the Market For Ideas: Evidence From Patent Grant Delays

Joshua S. Gans, David H. Hsu, Scott Stern

NBER Working Paper No. 13234
Issued in July 2007

---- Acknowledgements -----

We thank Nisvan Erkal, Thomas Hellmann, Guido Imbens, Ben Jones, Josh Lerner, Manju Puri, Jennifer Reinganum, Chris Taber, Marie Thursby, John van Reenen, and Ralph Winter, and seminar participants at various universities and conferences, for comments and discussion. We acknowledge funding support from the Mack Center at Wharton, the Intellectual Property Research Institute of Australia and the Australian Research Council. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.

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