"Stacking" or "Picking" Patents? The Inventors' Choice Between Quantity and Quality
This paper studies the determinants of the quantity and quality of inventors’ patents. It uses a sample of 793 inventors drawn from the PatVal-EU dataset and the information on EPO patents that they contributed to inventing during the period 1988-1998. It explores three aspects of the inventors’ productivity: 1) the number of EPO patents that they produce; 2) their average quality; 3) the quality of the most valuable patents. By jointly estimating the three equations we find that the inventors’ level of education, employment in a large firm and involvement in large-scale research projects positively affect quantity. Yet, apart from the size of the research project, none of these factors directly influences the expected quality of the innovations. They do, however, indirectly, as we find that the number of innovations explains the probability of producing a technological hit (the maximum value). Also, there are no decreasing returns in the innovation process at an individual level, as the number of innovations that an inventor produces is not correlated with their average quality.
|Date of creation:||14 Feb 2006|
|Contact details of provider:|| Postal: Piazza dei Martiri della Liberta, 33, 56127 Pisa|
Web page: http://www.lem.sssup.it/
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- F. M. Scherer, 2005. "Patents," Books, Edward Elgar Publishing, number 3903.
- Bronwyn Hall & Jacques Mairesse & Laure Turner, 2007.
"Identifying Age, Cohort, And Period Effects In Scientific Research Productivity: Discussion And Illustration Using Simulated And Actual Data On French Physicists,"
Economics of Innovation and New Technology,
Taylor & Francis Journals, vol. 16(2), pages 159-177.
- Bronwyn Hall & Jacques Mairesse & Laure Turner, 2005. "Identifying Age, Cohort and Period Effects in Scientific Research Productivity : Discussion and Illustration Using Simulated and Actual Data on French Physicists," Working Papers 2005-22, Centre de Recherche en Economie et Statistique.
- Hall, Bronwyn H. & Mairesse, Jacques & Turner, Laure, 2006. "Identifying Age, Cohort and Period Effects in Scientific Research Productivity - Discussion and Illustration Using Simulated and Actual Data on French Physicists," MERIT Working Papers 042, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
- Bronwyn H. Hall & Jacques Mairesse & Laure Turner, 2005. "Identifying Age, Cohort and Period Effects in Scientific Research Productivity: Discussion and Illustration Using Simulated and Actual Data on French Physicists," NBER Working Papers 11739, National Bureau of Economic Research, Inc.
- Hall, Bronwyn H & Jaffe, Adam B & Trajtenberg, Manuel, 2001.
"The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools,"
CEPR Discussion Papers
3094, C.E.P.R. Discussion Papers.
- Hall, B. & Jaffe, A. & Trajtenberg, M., 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," Papers 2001-29, Tel Aviv.
- Bronwyn H. Hall & Adam B. Jaffe & Manuel Trajtenberg, 2001. "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools," NBER Working Papers 8498, National Bureau of Economic Research, Inc.
- Jasjit Singh, 2005. "Collaborative Networks as Determinants of Knowledge Diffusion Patterns," Management Science, INFORMS, vol. 51(5), pages 756-770, May.
- Ernst, Holger, 1998. "Industrial research as a source of important patents," Research Policy, Elsevier, vol. 27(1), pages 1-15, May.
- Dietmar Harhoff & Francis Narin & Frederic M. Scherer & Katrin Vopel, 1997.
"Citation Frequency and the Value of Patented Innovation,"
CIG Working Papers
FS IV 97-26, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG).
- Vopel, Katrin & Scherer, Frederic M. & Narin, Francis & Harhoff, Dietmar, 1997. "Citation Frequency and the Value of Patented Innovation," ZEW Discussion Papers 97-27, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
- Zucker, Lynne G & Darby, Michael R & Armstrong, Jeff, 1998. "Geographically Localized Knowledge: Spillovers or Markets?," Economic Inquiry, Western Economic Association International, vol. 36(1), pages 65-86, January.
- Benjamin F. Jones, 2005. "Age and Great Invention," NBER Working Papers 11359, National Bureau of Economic Research, Inc.
- Harhoff, Dietmar & Reitzig, Markus, 2004.
"Determinants of opposition against EPO patent grants--the case of biotechnology and pharmaceuticals,"
International Journal of Industrial Organization,
Elsevier, vol. 22(4), pages 443-480, April.
- Harhoff, Dietmar & Reitzig, Markus, 2002. "Determinants of Opposition Against EPO Patent Grants - The Case of Biotechnology and Pharmaceuticals," CEPR Discussion Papers 3645, C.E.P.R. Discussion Papers.
- Zvi Griliches, 1998.
"Patent Statistics as Economic Indicators: A Survey,"
in: R&D and Productivity: The Econometric Evidence, pages 287-343
National Bureau of Economic Research, Inc.
- Griliches, Zvi, 1990. "Patent Statistics as Economic Indicators: A Survey," Journal of Economic Literature, American Economic Association, vol. 28(4), pages 1661-1707, December.
- Zvi Griliches, 1990. "Patent Statistics as Economic Indicators: A Survey," NBER Working Papers 3301, National Bureau of Economic Research, Inc.
- Sharon M. Oster & Daniel S. Hamermesh, 1998. "Aging And Productivity Among Economists," The Review of Economics and Statistics, MIT Press, vol. 80(1), pages 154-156, February.
- Arrow, Kenneth J., 1973. "Higher education as a filter," Journal of Public Economics, Elsevier, vol. 2(3), pages 193-216, July.
- Narin, Francis & Breitzman, Anthony, 1995. "Inventive productivity," Research Policy, Elsevier, vol. 24(4), pages 507-519, July.
- Brusoni, Stefano & Crespi, Gustavo & Francoz, Dominique & Gambardella, Alfonso & Garcia-Fontes, Walter & Geuna, Aldo & Giuri, Paola & Gonzales, Raul & Harhoff, Dietmar & Hoisl, Karin & LeBas, Christia, 2006.
"Everything You Always Wanted to Know about Inventors (But Never Asked): Evidence from the PatVal-EU Survey,"
CEPR Discussion Papers
5752, C.E.P.R. Discussion Papers.
- Harhoff, Dietmar & Hoisl, Karin, 2006. "Everything you Always Wanted to Know About Inventors (But Never Asked): Evidence from the PatVal-EU Survey," Discussion Papers in Business Administration 1261, University of Munich, Munich School of Management.
- Paola Giuri & Myriam Mariani & Stefano Brusoni & Gustavo Crespi & Dominique Francoz & Alfonso Gambardella & Walter Garcia-Fontes & Aldo Geuna & Raul Gonzales & Dietmar Harhoff & Karin Hoisl & Christia, 2005. "Everything you Always Wanted to Know about Inventors (but Never Asked): Evidence from the PatVal-EU Survey," LEM Papers Series 2005/20, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy.
- Paul Almeida & Bruce Kogut, 1999. "Localization of Knowledge and the Mobility of Engineers in Regional Networks," Management Science, INFORMS, vol. 45(7), pages 905-917, July.
- Walter Y. Oi & Todd L. Idson, 1999. "Workers Are More Productive in Large Firms," American Economic Review, American Economic Association, vol. 89(2), pages 104-108, May.
- repec:fth:harver:1473 is not listed on IDEAS
- Jean O. Lanjouw & Mark Schankerman, 2004. "Patent Quality and Research Productivity: Measuring Innovation with Multiple Indicators," Economic Journal, Royal Economic Society, vol. 114(495), pages 441-465, 04.
- Levin, Sharon G & Stephan, Paula E, 1991. "Research Productivity over the Life Cycle: Evidence for Academic Scientists," American Economic Review, American Economic Association, vol. 81(1), pages 114-132, March.
When requesting a correction, please mention this item's handle: RePEc:ssa:lemwps:2006/06. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.