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International Knowledge Flows: Evidence from Patent Citation

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  • Jaffe, A.B.
  • Trajtenberg, M.

Abstract

This paper explores the patterns of citations among patents taken out by inventors in the U.S., the U.K., France, Germany and Japan. We find that, (1) Patets assigned to the same firm are more likely to cit each other, and come sooner that other citations; (2) patents in the same patent class are approximately 100 times as likely to cite each other as patents from different patent classes, but there is not a strong time pattern to this effect; (3) patents whose investors reside in the same country are typically 30 to 80% more likely to cite each other than inventors from other countries, and these, and these citations come sooner, and (4) there are clear country-specific citation tendencies, e.g., Japanese citations typically come sooner than those of other countries.

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Bibliographic Info

Paper provided by Tel Aviv in its series Papers with number 11-98.

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Length: 37 pages
Date of creation: 1998
Date of revision:
Handle: RePEc:fth:teavfo:11-98

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Phone: 972-3-640-9255
Fax: 972-3-640-5815
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Web page: http://econ.tau.ac.il/research/foerder.asp
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Keywords: PATENTS ; CITATIONS ; SPILLOVERS;

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References

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  1. Paul M Romer, 1999. "Endogenous Technological Change," Levine's Working Paper Archive 2135, David K. Levine.
  2. Adam B. Jaffe, 1986. "Technological Opportunity and Spillovers of R&D: Evidence from Firms' Patents, Profits and Market Value," NBER Working Papers 1815, National Bureau of Economic Research, Inc.
  3. Zvi Griliches, 1998. "Patent Statistics as Economic Indicators: A Survey," NBER Chapters, in: R&D and Productivity: The Econometric Evidence, pages 287-343 National Bureau of Economic Research, Inc.
  4. Teece, David J, 1977. "Technology Transfer by Multinational Firms: The Resource Cost of Transferring Technological Know-how," Economic Journal, Royal Economic Society, vol. 87(346), pages 242-61, June.
  5. David T. Coe & Elhanan Helpman, 1993. "International R&D Spillovers," NBER Working Papers 4444, National Bureau of Economic Research, Inc.
  6. Park, Walter G, 1995. "International R&D Spillovers and OECD Economic Growth," Economic Inquiry, Western Economic Association International, vol. 33(4), pages 571-91, October.
  7. Jonathan Eaton & Samuel Kortum, 1995. "Trade in Ideas: Patenting and Productivity in the OECD," NBER Working Papers 5049, National Bureau of Economic Research, Inc.
  8. Grossman, G.M. & Helpman, E., 1989. "Quality Ledders In The Theory Of Growth," Papers 148, Princeton, Woodrow Wilson School - Public and International Affairs.
  9. Jaffe, Adam B & Fogarty, Michael S & Banks, Bruce A, 1998. "Evidence from Patents and Patent Citations on the Impact of NASA and Other Federal Labs on Commercial Innovation," Journal of Industrial Economics, Wiley Blackwell, vol. 46(2), pages 183-205, June.
  10. repec:fth:harver:1473 is not listed on IDEAS
  11. Ricardo J. Caballero & Adam B. Jaffe, 1993. "How High are the Giants' Shoulders: An Empirical Assessment of Knowledge Spillovers and Creative Destruction in a Model of Economic Growth," NBER Working Papers 4370, National Bureau of Economic Research, Inc.
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