Indirect Patent Citations
AbstractPatent citations are extensively used as a measure of patent quality. However, counting citations does not account for the fast that citations corne from patents of different qualities, and that some citations are of a higher quality than other citations. We propose and develop a citation index which takes into account the cumulative quality of the citing patents. We apply this index to the 2,139,314 utility patents granted in the U.S. between 1975 and 1999. We study the properties of this index by year and by technological category, and analyse the links between patents.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by University of Ottawa, Department of Economics in its series Working Papers with number 0302E.
Length: 33 pages
Date of creation: 2003
Date of revision:
Contact details of provider:
Postal: PO Box 450, Station A, Ottawa, Ontario, K1N 6N5
Phone: (613) 562-5753
Fax: (613) 562-5999
Web page: http://www.socialsciences.uottawa.ca/eco/eng/index.asp
More information through EDIRC
Patents; Patent citations; Patent quality;
Find related papers by JEL classification:
- C25 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions
- O31 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
- O34 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital
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.:
- Martin, Stephen & Scott, John T., 2000.
"The nature of innovation market failure and the design of public support for private innovation,"
Elsevier, vol. 29(4-5), pages 437-447, April.
- Stephen Martin & John T. Scott, 1999. "The Nature of Innovation Market Failure and the Design of Public Support for Private Innovation," CIE Discussion Papers 1999-02, University of Copenhagen. Department of Economics. Centre for Industrial Economics.
- Poyago-Theotoky, Joanna, 1998. "R&D Competition in a Mixed Duopoly under Uncertainty and Easy Imitation," Journal of Comparative Economics, Elsevier, vol. 26(3), pages 415-428, September.
- Ekholm, Karolina & Torstensson, Johan, 1996.
"High-Technology Subsidies in General Equilibrium: A Sector-Specific Approach,"
Working Paper Series
467, Research Institute of Industrial Economics.
- Karolina Ekholm & Johan Torstensson, 1997. "High-Technology Subsidies in General Equilibrium: A Sector-Specific Approach," Canadian Journal of Economics, Canadian Economics Association, vol. 30(4), pages 1184-1203, November.
- Lakdawalla, Darius & Sood, Neeraj, 2004. "Social insurance and the design of innovation incentives," Economics Letters, Elsevier, vol. 85(1), pages 57-61, October.
- Miyagiwa, Kaz & Ohno, Yuka, 2002. "Uncertainty, spillovers, and cooperative R&D," International Journal of Industrial Organization, Elsevier, vol. 20(6), pages 855-876, June.
- Petrakis, Emmanuel & Poyago-Theotoky, Joanna, 2002. "R&D Subsidies versus R&D Cooperation in a Duopoly with Spillovers and Pollution," Australian Economic Papers, Wiley Blackwell, vol. 41(1), pages 37-52, March.
- Isabel Busom, 2000. "An Empirical Evaluation of The Effects of R&D Subsidies," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 9(2), pages 111-148.
- Minoru Kitahara & Toshihiro Matsumura, 2006. "Realized Cost-Based Subsidies For Strategic R&D Investments With "Ex Ante" And "Ex Post" Asymmetries," The Japanese Economic Review, Japanese Economic Association, vol. 57(3), pages 438-448.
- Klette, T.J. & Moen, J. & Griliches, Z., 1999. "Do Subsidies to Commercial R&D Reduce Market Failures? Microeconometric Evaluation Studies," Papers 16/99, Norwegian School of Economics and Business Administration-.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Diane Ritchot).
If references are entirely missing, you can add them using this form.