NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Patent Pools and the Direction of Innovation - Evidence from the 19th-century Sewing Machine Industry

Ryan L. Lampe, Petra Moser

NBER Working Paper No. 17573
Issued in November 2011

---- Acknowledgements -----

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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