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The value of knowledge spillovers

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  • Yi Deng

Abstract

This paper aims at quantifying the economic value of knowledge spillovers by exploring information contained in patent citations. We estimate a market valuation equation for semiconductor firms during the 1980s and 1990s, and find an average value in the amount of $0.6 to 1.2 million "R&D-equivalent" dollars for the knowledge spillovers as embodied in one patent citation. For an average semiconductor firm, such an estimate implies that the total value of knowledge spillovers the firm received during the sample period could be as high as half of its actual total R&D expenditures in the same period. This provides a direct measure of the economic values of the social returns or externalities of relevant technological innovations. We also find that the value of knowledge spillovers declines as the size of the firm's patent portfolio increases, and that self citations are more valuable than external citations, indicating a significant amount of tacit knowledge or know-how spillovers that occur within the firm.

Suggested Citation

  • Yi Deng, 2005. "The value of knowledge spillovers," Working Paper Series 2005-14, Federal Reserve Bank of San Francisco.
  • Handle: RePEc:fip:fedfwp:2005-14
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    Citations

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    Cited by:

    1. Antoine Dechezlepretre, Ralf Martin, Myra Mohnen, 2017. "Knowledge Spillovers from clean and dirty technologies," GRI Working Papers 135, Grantham Research Institute on Climate Change and the Environment.
    2. Femminis, Gianluca & Martini, Gianmaria, 2011. "Irreversible investment and R&D spillovers in a dynamic duopoly," Journal of Economic Dynamics and Control, Elsevier, vol. 35(7), pages 1061-1090, July.
    3. Watzinger, Martin & Schnitzer, Monika, 2014. "Measuring Spillovers of Venture Capital," Annual Conference 2014 (Hamburg): Evidence-based Economic Policy 100318, Verein f├╝r Socialpolitik / German Economic Association.
    4. Yi Deng & Gabriel Picone, 2013. "Strategic Clustering and Competition by Alcohol Retailers: An Emperical Anlysis of Entry and Location Decisions," Working Papers 1013, University of South Florida, Department of Economics.
    5. Antoine Dechezleprêtre & Ralf Martin & Myra Mohnen, 2014. "Knowledge Spillovers from Clean and Dirty Technologies," CEP Discussion Papers dp1300, Centre for Economic Performance, LSE.
    6. Mariana Mazzucato & Massimiliano Tancioni, 2012. "R&D, patents and stock return volatility," Journal of Evolutionary Economics, Springer, vol. 22(4), pages 811-832, September.
    7. repec:spr:scient:v:89:y:2011:i:3:d:10.1007_s11192-011-0473-z is not listed on IDEAS
    8. Patel, Darshak & Ward, Michael R., 2011. "Using patent citation patterns to infer innovation market competition," Research Policy, Elsevier, vol. 40(6), pages 886-894, July.
    9. Dibiaggio, Ludovic & Nasiriyar, Maryam & Nesta, Lionel, 2014. "Substitutability and complementarity of technological knowledge and the inventive performance of semiconductor companies," Research Policy, Elsevier, vol. 43(9), pages 1582-1593.
    10. Christiaan Hogendorn, 2012. "Spillovers and Network Neutrality," Chapters,in: Regulation and the Performance of Communication and Information Networks, chapter 8 Edward Elgar Publishing.
    11. Chun-chieh Wang & Mu-hsuan Huang & Dar-zen Chen, 2012. "The Evolution of Knowledge Spillover and Company cluster in Semiconductor Industry," Journal of the Knowledge Economy, Springer;Portland International Center for Management of Engineering and Technology (PICMET), vol. 3(2), pages 109-124, June.

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    Keywords

    Patents ; Research and development ; Semiconductor industry ; Technological innovations;

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