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The Role Of Patent, Citation And Objection Stocks In The Productivity Analysis Of R&D — Using Japanese Company Data

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  • YASUYUKI ISHII

    (Department of Intellectual Property Strategy, Graduate School of Management of Science and Technology, Tokyo University of Science, Japan)

Abstract

In this paper, I examine the role of patent stock, citation stock and objection stock in the analysis of R&D productivity and the exact interrelationships between those stocks by using new data on 100 large Japanese companies. I find, first, that citation and objection stock represent the knowledge stock of the company well, whereas patent stock itself is an ineffective proxy for the knowledge stock. Objection stock seems to be the best proxy for the knowledge stock. Second, citation and objection stocks are effective in playing the role of control factors for successful R&D stock, whereas patent stock is only effective if lags in R&D stock are incorporated. Third, citation and objection stocks are good proxies for controlling for the quality of patent stock. Citation stock seems to be the best variable for controlling for R&D stock and patent stock.

Suggested Citation

  • Yasuyuki Ishii, 2010. "The Role Of Patent, Citation And Objection Stocks In The Productivity Analysis Of R&D — Using Japanese Company Data," International Journal of Innovation Management (ijim), World Scientific Publishing Co. Pte. Ltd., vol. 14(05), pages 947-963.
    • Handle: RePEc:wsi:ijimxx:v:14:y:2010:i:05:n:s1363919610002945
    DOI: 10.1142/S1363919610002945
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    References listed on IDEAS

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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.

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