What percentage of innovations are patented? empirical estimates for European firms

Anthony Vere Arundel and Isabelle Kabla

Research Policy, 1998, vol. 27, issue 2, pages 127-141

Date: 1998
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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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