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

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Author Info
Albert G.Z. Hu
Adam B. Jaffe

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Abstract

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.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 8528.

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Date of creation: Oct 2001
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Handle: RePEc:nbr:nberwo:8528

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O3 - Economic Development, Technological Change, and Growth - - Technological Change

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  1. Jinyoung Kim & Sangjoon John Lee & Gerald Marschke, 2006. "International Knowledge Flows: Evidence from an Inventor-Firm Matched Data Set," NBER Working Papers 12692, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  2. Yao Li, 2009. "Borders and Distance in Knowledge Spillovers: Dying over Time or Dying with Age? - Evidence from Patent Citations," CESifo Working Paper Series CESifo Working Paper No. , CESifo Group Munich. [Downloadable!]
  3. Tulus Tambunnan, 2007. "Trade and Investment Liberalization Effects on SME Development: A Literature Review and a Case Study of Indonesia," Working Papers 4207, Asia-Pacific Research and Training Network on Trade (ARTNeT), an initiative of UNESCAP and IDRC, Canada.. [Downloadable!]
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This page was last updated on 2009-12-14.

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