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Innovation networks in China, Japan, and Korea : further evidence from U.S. patent data

  • Nabeshima, Kaoru
  • Tanaka, Kiyoyasu

The growing importance of innovation in economic growth has encouraged the development of innovation capabilities in East Asia, within which China, Japan, and Korea are most important in terms of technological capabilities. Using U.S. patent data, we examine how knowledge networks have developed among these countries. We find that Japan's technological specialization saw gradual changes, but those of Korea and China changed rapidly since 1970s. By the year 2009, technology specialization has become similar across three countries in the sense that the common fields of prominent technology are electronics and semiconductors. Patent citations suggest that technology flows were largest in the electronics technology, pointing to the deepening of innovation networks in these countries. Together with our prior work, the Japanese and U.S. data produce similar conclusions about innovation networks.

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Paper provided by Institute of Developing Economies, Japan External Trade Organization(JETRO) in its series IDE Discussion Papers with number 297.

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Date of creation: Apr 2011
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Publication status: Published in IDE Discussion Paper. No. 297. 2011.4
Handle: RePEc:jet:dpaper:dpaper297
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  1. Shahid Yusuf & Kaoru Nabeshima, 2009. "Tiger Economies Under Threat : A Comparative Analysis of Malaysia's Industrial Prospects and Policy Options," World Bank Publications, The World Bank, number 2680, June.
  2. Picci, Lucio, 2009. "The Internationalization of Inventive Activity: A Gravity Model Using Patent Data," MPRA Paper 18467, University Library of Munich, Germany.
  3. Zvi Griliches, 1990. "Patent Statistics as Economic Indicators: A Survey," NBER Working Papers 3301, National Bureau of Economic Research, Inc.
  4. Giovanni Peri, 2005. "Determinants of Knowledge Flows and Their Effect on Innovation," The Review of Economics and Statistics, MIT Press, vol. 87(2), pages 308-322, May.
  5. repec:fth:harver:1473 is not listed on IDEAS
  6. Hall, Bronwyn H & Jaffe, Adam B & Trajtenberg, Manuel, 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," CEPR Discussion Papers 3094, C.E.P.R. Discussion Papers.
  7. Goto, Akira & Motohashi, Kazuyuki, 2007. "Construction of a Japanese Patent Database and a first look at Japanese patenting activities," Research Policy, Elsevier, vol. 36(9), pages 1431-1442, November.
  8. Kuroiwa, Ikuo & Nabeshima, Kaoru & Tanaka, Kiyoyasu, 2011. "Innovation networks in China, Japan, and Korea : evidence from Japanese patent data," IDE Discussion Papers 285, Institute of Developing Economies, Japan External Trade Organization(JETRO).
  9. Sakakibara, Mariko & Branstetter, Lee, 2001. "Do Stronger Patents Induce More Innovation? Evidence from the 1988 Japanese Patent Law Reforms," RAND Journal of Economics, The RAND Corporation, vol. 32(1), pages 77-100, Spring.
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