NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Patent Citations and International Knowledge Flow: The Cases of Korea and Taiwan

Albert G.Z. Hu, Adam B. Jaffe

NBER Working Paper No. 8528
Issued in October 2001
NBER Program(s):   PR

This paper examines patterns of knowledge diffusion from US and Japan to Korea and Taiwan using patent citations as an indicator of knowledge flow. We estimate a knowledge diffusion model using a data set of all patents granted in the U.S. to inventors residing in these four countries. Explicitly modeling the roles of technology proximity and knowledge decay and knowledge diffusion over time, we have found that knowledge diffusion from US and Japan to Korea and Taiwan exhibits quite different patterns. It is much more likely for Korean patents to cite Japanese patents than US patents, whereas Taiwanese inventors tend to learn evenly from both US and Japanese inventors. The frequency of a Korean patent citing a Japanese patent is almost twice that of the frequency of a Taiwanese patent citing a Japanese patent. We also find that a patent is much more likely to cite a patent from its own technological field than from another field.

download in pdf format
   (486 K)

email paper

This paper is available as PDF (486 K) or via email.

Machine-readable bibliographic record - MARC, RIS, BibTeX

Document Object Identifier (DOI): 10.3386/w8528

Published: Hu, Albert G. Z. & Jaffe, Adam B., 2003. "Patent citations and international knowledge flow: the cases of Korea and Taiwan," International Journal of Industrial Organization, Elsevier, vol. 21(6), pages 849-880, June. citation courtesy of

Users who downloaded this paper also downloaded these:
Jaffe and Trajtenberg w6507 International Knowledge Flows: Evidence from Patent Citations
Hall, Jaffe, and Trajtenberg w8498 The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools
Jaffe, Trajtenberg, and Henderson w3993 Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations
Wang and Tsai w9724 Productivity Growth and R&D Expenditure in Taiwan's Manufacturing Firms
Jaffe and Trajtenberg w5712 Flows of Knowledge from Universities and Federal Labs: Modeling the Flowof Patent Citations Over Time and Across Institutional and Geographic Boundari
 
Publications
Activities
Meetings
NBER Videos
Data
People
About

Support
National Bureau of Economic Research, 1050 Massachusetts Ave., Cambridge, MA 02138; 617-868-3900; email: info@nber.org

Contact Us