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Localized knowledge spillovers and patent citations: A distance-based approach (revised version)

Author

Listed:
  • Yasusada Murata

    (Advanced Research Institute for the Sciences and Humanities, Nihon University)

  • Ryo Nakajima

    (Department of Economics, Keio University)

  • Ryosuke Okamoto

    (National Graduate Institute for Policy Studies)

  • Ryuichi Tamura

    (Center for Economic Growth Strategy, Yokohama National University)

Abstract
We develop a new distance-based test of localized knowledge spillovers that embeds the concept of control patents. Using microgeographic data, we identify localization distance for each technology class while allowing for spillovers across geographic units. We revisit the debate by Thompson and Fox-Kean (2005a,b) and Henderson, Jaffe and Trajtenberg (2005) on the existence of localized knowledge spillovers, and find solid evidence supporting localization even when using fine-grained controls. We further relax the assumption of perfect controls, and show that our distance-based test detects localization for the majority of technology classes unless hidden biases induced by imperfect controls are extremely large.

Suggested Citation

  • Yasusada Murata & Ryo Nakajima & Ryosuke Okamoto & Ryuichi Tamura, 2013. "Localized knowledge spillovers and patent citations: A distance-based approach (revised version)," GRIPS Discussion Papers 12-18, National Graduate Institute for Policy Studies.
    • Handle: RePEc:ngi:dpaper:12-18
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    References listed on IDEAS

    as
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    5. Guildo W. Imbens, 2003. "Sensitivity to Exogeneity Assumptions in Program Evaluation," American Economic Review, American Economic Association, vol. 93(2), pages 126-132, May.
    6. Yasusada Murata & Ryo Nakajima & Ryosuke Okamoto & Ryuichi Tamura, 2014. "Localized Knowledge Spillovers and Patent Citations: A Distance-Based Approach," The Review of Economics and Statistics, MIT Press, vol. 96(5), pages 967-985, December.
    7. Adam B. Jaffe & Manuel Trajtenberg & Rebecca Henderson, 1993. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 108(3), pages 577-598.
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    Cited by:

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    2. Diemer, Andreas & Regan, Tanner, 2022. "No inventor is an island: Social connectedness and the geography of knowledge flows in the US," Research Policy, Elsevier, vol. 51(2).
    3. Duranton, Gilles & Puga, Diego, 2014. "The Growth of Cities," Handbook of Economic Growth, in: Philippe Aghion & Steven Durlauf (ed.), Handbook of Economic Growth, edition 1, volume 2, chapter 5, pages 781-853, Elsevier.
    4. Carlo MENON, 2014. "La propagation des grandes idées? L\'impact de l\'activité de brevet des firmes leader sur les inventeurs locaux," Cahiers du GREThA (2007-2019) 2014-11, Groupe de Recherche en Economie Théorique et Appliquée (GREThA).
    5. Mikko Packalen & Jay Bhattacharya, 2015. "Cities and Ideas," NBER Working Papers 20921, National Bureau of Economic Research, Inc.

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