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

Patent Statistics as Economic Indicators: A Survey

Zvi Griliches · Journal of Economic Literature · 1990 · 4.1K citations

Management, Business Economics, Economics +16

Appropriating the Returns from Industrial Research and Development

Richard C. Levin, Alvin K. Klevorick, Richard R. Nelson et al. · Brookings Papers on Economic Activity · 1987 · 3.8K citations · Full text

Social Sciences, Business Economics, Economics +12

Innovation in Large and Small Firms: An Empirical Analysis

Zoltán J. Ács, David B. Audretsch · Edward Elgar Publishing eBooks · 2008 · 1.2K citations · Full text

Management, Business Economics, Strategic Management +15

Firm Size and the Nature of Innovation within Industries: The Case of Process and Product R&D

Wesley M. Cohen, Steven Klepper · The Review of Economics and Statistics · 1996 · 1.2K citations

Management, Economics, Innovation Management +13

Patents and Innovation: An Empirical Study

Edwin Mansfield · Management Science · 1986 · 1.1K citations

Management, Innovation Management, Technology Management +12