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Flows of Knowledge from Universities and Federal Labs: Modeling the Flowof Patent Citations Over Time and Across Institutional and Geographic Boundari / Adam B. Jaffe, Manuel Trajtenberg.
- Format:
- Book
- Author/Creator:
- Jaffe, Adam B.
- Series:
- Working Paper Series (National Bureau of Economic Research) no. w5712.
- NBER working paper series no. w5712
- Language:
- English
- Physical Description:
- 1 online resource: illustrations (black and white);
- Other Title:
- Flows of Knowledge from Universities and Federal Labs
- Place of Publication:
- Cambridge, Mass. National Bureau of Economic Research 1996.
- Summary:
- The extent to which new technological knowledge flows across institutional and national boundaries is a question of great importance for public policy and the modeling of economic growth. This paper develops a model of the process generating subsequent citations to patents as a lens for viewing knowledge diffusion. We find that the probability of patent citation over time after a patent is granted fits well to a double-exponential function that can be interpreted as the mixture of diffusion and obsolescence functions. The results indicate that diffusion is geographically localized. Controlling for other factors, within-country citations are more numerous and come more quickly than those that cross country boundaries.
- Notes:
- Print version record
- August 1996.
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