NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Harmonizing and Combining Large Datasets – An Application to Firm-Level Patent and Accounting Data

Grid Thoma, Salvatore Torrisi, Alfonso Gambardella, Dominique Guellec, Bronwyn H. Hall, Dietmar Harhoff

NBER Working Paper No. 15851
Issued in March 2010

---- Acknowledgements -----

We thank Jim Bessen, Hélène Dernis, Megan MacGarvie, Paola Giuri, Stine Grodal, Myriam Mariani, Kazu Motohashi, Teruo Okazaki, James Rollinson, Philipp Sander, Georg von Graevenitz, Stefan Wagner, Norihiko Yamano, Maria Pluvia Zuniga, and the participants at the PATSTAT Users’ Meeting in Paris in March 2008, seminars at the Ludwig-Maximilians-Universität München and Università L. Bocconi in Milan for very fruitful discussions. We also thank Armando Benincasa and Luisa Quarta from Bureau Van Dijk for clarifications about the structure of the Amadeus database and its changes over time. Thoma and Hall are grateful to the Kauffman Foundation for support of some of this work. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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