NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Entry and Patenting in the Software Industry

Iain M. Cockburn, Megan J. MacGarvie

NBER Working Paper No. 12563
Issued in October 2006

---- Acknowledgements -----

Support for this research and access to data were provided by LECG Inc., via an unrestricted grant from Microsoft Corporation. We thank the editors and referees for helpful comments, as well as Anne Layne-Farrar, Alfonso Gambardella, Daniel Garcia-Swartz, Shane Greenstein, Josh Lerner, Robert Merges,Marc Rysman, Mark Schankerman, Ken Simons, Manuel Trajtenberg, and Sam Thompson along with numerous seminar and conference participants.

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