Growth and Intellectual Property
---- Acknowledgements -----
This paper is based upon work supported by the National Science Foundation under Grants SES 01-14147 and 03-14713. Boldrin also acknowledges research support from SEJ2005-08783-C04-01 (Ministry of Education, Spain). Our ideas benefited from comments received during presentations at Columbia University, Dallas, Richmond and San Francisco Federal Reserve Banks, Chinese University of Hong Kong, ASU, Rochester, and from discussions with Kyle Bagwell, Gene Grossman, Chad Jones, Pete Klenow, Paul Romer, Suzanne Scotchmer and Daniel Wilson. Thanks are also due to Hengjie Ai research assistance in collecting and analyzing data. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.