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Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms

Author

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  • Nakanishi, Yasuo
  • Yamada, Setsuo

Abstract

This article assesses the rate of obsolescence of patents with measurements of the rate in Japan. Our study departs from Parkes and Schankerman (1989) and Schankerman (1998) because of its application of the ordered probit model. The application of this model enables us to consider the case of noncontinuous renewal fees. The estimated value of the rate of obsolescence in Chemicals is apparently large. Values of obsolescence rate in each industry except Chemicals are located above 24%. The obsolescence rate obtained by our estimates is apparently higher than in previous studies.

Suggested Citation

  • Nakanishi, Yasuo & Yamada, Setsuo, 2008. "Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms," MPRA Paper 10837, University Library of Munich, Germany.
  • Handle: RePEc:pra:mprapa:10837
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    File URL: https://mpra.ub.uni-muenchen.de/10837/1/MPRA_paper_10837.pdf
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    Cited by:

    1. Ovsiannikov, Kostiantyn, 2020. "Does Tokyo Stock Exchange Appreciate Corporate Innovations? Role of Patents’ Quality and Research Productivity," SocArXiv k4ys6, Center for Open Science.

    More about this item

    Keywords

    Obsolescence rate; Patent; Innovation; Ordered probit model;
    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

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