Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations
We compare the geographic location of patent citations to those of the cited patents, as evidence of the extent to which knowledge spillovers are geographically localized. We find that citations to U.S. patents are more likely to come from the U.S., and more likely to come from the same state and SMSA as the cited patents than one would expect based only on the preexisting concentration of related research activity. These effects are particularly significant at the local (SMSA) level, and are particularly apparent in early citations.
|Date of creation:||Feb 1992|
|Publication status:||published as The Quarterly Journal of Economics, vol cviii. August 1993, issue 3 (MIT Press, Cambridge), p. 577|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
Web page: http://www.nber.org
More information through EDIRC
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.:
- Carpenter, Mark P. & Narin, Francis, 1983. "Validation study: Patent citations as indicators of science and foreign dependence," World Patent Information, Elsevier, vol. 5(3), pages 180-185.
- Bernstein, Jeffrey I & Nadiri, M Ishaq, 1988.
"Interindustry R&D Spillovers, Rates of Return, and Production in High-Tech Industries,"
American Economic Review,
American Economic Association, vol. 78(2), pages 429-434, May.
- Jeffrey I. Bernstein & M. Ishaq Nadiri, 1988. "Interindustry R&D Spillovers, Rates Of Return, and Production In High-Tech Industries," NBER Working Papers 2554, National Bureau of Economic Research, Inc.
- Jeffrey Bernstein & Ishaq Nadiri, 1988. "Interindustry R&D Spillovers, Rates of Return, and Production in High-Tech Industries," Carleton Industrial Organization Research Unit (CIORU) 88-01, Carleton University, Department of Economics.
When requesting a correction, please mention this item's handle: RePEc:nbr:nberwo:3993. 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 you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.