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Market value and patent citations, , and . The RAND Journal of Economics, (2005)The NBER patent citation data file: Lessons, insights and methodological tools, , and . NBER working paper 8498, (2001)Adoption of New Technology, and . Working Paper, 9730. National Bureau of Economic Research, 1050 Massachusetts Avenue, Cambridge, MA 02138, (May 2003)Exploring the relationship between R&D and productivity in French manufacturing firms, and . Journal of Econometrics, 65 (1): 263--293 (January 1995)Software for the computation of Tobit model estimates. Journal of Econometrics, 24 (1-2): 215--222 (00 1984)R-&-D tax policy during the eighties. Working paper National Bureau of Economic Research, Cambridge, Mass., (1992)Heart of darkness: modeling public–private funding interactions inside the R&D black box, and . Research Policy, 29 (9): 1165--1183 (December 2000)The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools, , and . NBER Work. P., (September 2001)University-Industry Research Partnerships in the United States. (2004)The strategic use of patents and its implications for enterprise and competition policies, , , , , , and . Final Report, ENTR/05/82. DG Enterprise, European Commission, (July 2007)