The changing composition of innovative activity in the US -- a portrait based on patent analysis

Diana Hicks, Tony Breitzman, Dominic Olivastro and Kimberly Hamilton

Research Policy, 2001, vol. 30, issue 4, pages 681-703

Date: 2001
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Research Policy is edited by M. Bell, B. Martin, W.E. Steinmueller, A. Arora, M. Callon, M. Kenney, S. Kuhlmann, Keun Lee and F. Murray

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