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Measuring science and innovation linkage using text mining of research papers and patent information

Author

Listed:
  • Kazuyuki Motohashi

    (The University of Tokyo
    RIETI)

  • Hitoshi Koshiba

    (NISTEP)

  • Kenta Ikeuchi

    (RIETI)

Abstract

In this study, the text information of academic papers published by Japanese authors (about 1.7 million papers) and patents filed with the Japan Patent Office (about 12.3 million patents) since 1991 are used for analyzing the inter-relationship between science and technology. Specifically, a distributed representation vector using the title and abstract of each document is created, then neighboring documents to each are identified using the cosine similarity. A time trend and sector specific linkages within science and technology are identified by using the count of neighbor patents (papers) for each paper (patent). It is found that the science intensity of inventions (the number of neighbor papers for patents) increases over time, particularly for university/PRI patents and university–industry collaboration patents over the 30 years studied. As for university/PRI patents, the institutional reforms for the science sector (government laboratory incorporation in 2001 and national university incorporation in 2004) contributed to the interactions between science and technology. In contrast, the technology intensity of science (the number of neighbor patents by paper) decreases over time. It is also found that the technology intensity of life science papers is rather low, although they have a significant impact on subsequent patents. However, there are some scientific fields which are affected by technological developments, so that the state of science and innovation interactions is heterogeneous across the fields.

Suggested Citation

  • Kazuyuki Motohashi & Hitoshi Koshiba & Kenta Ikeuchi, 2024. "Measuring science and innovation linkage using text mining of research papers and patent information," Scientometrics, Springer;Akadémiai Kiadó, vol. 129(4), pages 2159-2179, April.
    • Handle: RePEc:spr:scient:v:129:y:2024:i:4:d:10.1007_s11192-024-04949-w
    DOI: 10.1007/s11192-024-04949-w
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    References listed on IDEAS

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    1. 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.
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    More about this item

    Keywords

    Text analysis; Patent information; Research paper; Science and technology linkage;
    All these keywords.

    JEL classification:

    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital

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