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Knowledge flow and sequential innovation: implications for technology diffusion, r&d and market value

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  • Belenzon, Sharon

Abstract

It is shown that spillovers can enhance private returns to innovation if they feed back into the dynamic research of the original inventor (Internalized spillovers), but will always reduce private returns, if the original inventor does not benefit from the advancements other inventors build into the “spilled” knowledge (Externalized spillovers). I empirically identify unique patterns of knowledge flows (based on patent citations), which provide information about whether “spilled” knowledge is reabsorbed by its inventor. A simple model of sequential innovation with dynamic spillovers is developed, which predicts that market value and R&D expenditures should rise with Internalized spillovers and fall with Externalized spillovers. These predications are confirmed using panel data on U.S. firms between 1981 and 2001. To the extent that firms internalize some of the spillovers they create, the classical underinvestment problem in R&D will be mitigated and the central role of spillovers in promoting economic growth will be enhanced.

Suggested Citation

  • Belenzon, Sharon, 2006. "Knowledge flow and sequential innovation: implications for technology diffusion, r&d and market value," LSE Research Online Documents on Economics 19864, London School of Economics and Political Science, LSE Library.
    • Handle: RePEc:ehl:lserod:19864
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    File URL: http://eprints.lse.ac.uk/19864/
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    Citations

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    Cited by:

    1. Rockett, Katharine, 2010. "Property Rights and Invention," Handbook of the Economics of Innovation, in: Bronwyn H. Hall & Nathan Rosenberg (ed.), Handbook of the Economics of Innovation, edition 1, volume 1, chapter 0, pages 315-380, Elsevier.
    2. Jorge L. Contreras & Bronwyn H. Hall & Christian Helmers, 2018. "Green Technology Diffusion: A Post-Mortem Analysis of the Eco-Patent Commons," NBER Working Papers 25271, National Bureau of Economic Research, Inc.
    3. John Laitner & Dmitriy Stolyarov, 2013. "Derivative Ideas And The Value Of Intangible Assets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 54(1), pages 59-95, February.
    4. Jessica C. Stahl, 2010. "Mergers and sequential innovation: evidence from patent citations," Finance and Economics Discussion Series 2010-12, Board of Governors of the Federal Reserve System (U.S.).
    5. Liu, Kun & Arthurs, Jonathan & Cullen, John & Alexander, Roger, 2008. "Internal sequential innovations: How does interrelatedness affect patent renewal?," Research Policy, Elsevier, vol. 37(5), pages 946-953, June.

    More about this item

    Keywords

    market value; patents; R&D and spillovers;
    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
    • O33 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes
    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D

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