NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

The market value of patents and R&D: Evidence from European firms

Bronwyn H. Hall, Grid Thoma, Salvatore Torrisi

NBER Working Paper No. 13426
Issued in September 2007

---- Acknowledgements -----

We thank Rishab Ghosh and the participants in the EC DG IT study on "The effects of allowing patents claims for computer-implemented inventions" for discussing with us several issues concerning patents and IPR. Moreover, we would like to thank Armando Benincasa from Bureau Van Dijk, Elvio Ciccardini, and Gianluca Tarasconi from CESPRI - Bocconi University for their valuable assistance in data collection. Colin Webb has provided us with data on citations to EPO patents. Comments from seminar and conference participants at CESPRI-Bocconi University, NBER, the Dept of Management of Carlos III University, the Department of Management of Bologna University, and the OECD have also been helpful in producing the current revision. 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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