References

• 1989Innovation and Learning: The Two Faces of R & D7,527 cited
• 2000Protecting Their Intellectual Assets: Appropriability Conditions and Why U.S. Manufacturing Firms Patent (or Not)3,045 cited
• 2002The Financing of Research and Development1,800 cited
• 2000Is public R&D a complement or substitute for private R&D? A review of the econometric evidence1,638 cited
• 1978Estimating the Effect of Training Programs on Earnings1,515 cited
• 2002CEO Characteristics and Firm R&D Spending1,468 cited
• 1992The Search for R&D Spillovers1,454 cited
• 1995On the sources and significance of interindustry differences in technological opportunities1,421 cited
• 1999The Government as Venture Capitalist: The Long‐Run Impact of the SBIR Program1,252 cited
• 1996A Reprise of Size and R & D1,223 cited
• 1998Absorptive Capacity, Coauthoring Behavior, and the Organization of Research in Drug Discovery1,199 cited
• 1991The Search for R&D Spillovers1,169 cited
• 2000The Effects of Government-Industry R&D Programs on Private R&D: The Case of the Small Business Innovation Research Program1,067 cited
• 2000How effective are fiscal incentives for R&D? A review of the evidence1,014 cited
• 1997Internal R & D expenditures and external technology sourcing