Localized knowledge spillovers and patent citations: A distance-based approach

Yasusada Murata, Ryo Nakajima, Ryosuke Okamoto, Ryuichi Tamura

研究成果: Article

22 引用 (Scopus)

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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 between Thompson and Fox-Kean (2005a, 2005b) and Henderson, Jaffe, and Trajtenberg (2005) on the existence of localized knowledge spillovers and find solid evidence supporting localization even when using finely grained controls. Unless biases induced by imperfect matching between citing and control patents due to unobserved heterogeneity are extremely large, our distance-based test detects localization for the majority of technology classes.

元の言語English
ページ(範囲)967-985
ページ数19
ジャーナルReview of Economics and Statistics
96
発行部数5
DOI
出版物ステータスPublished - 2014 12 1

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ASJC Scopus subject areas

  • Social Sciences (miscellaneous)
  • Economics and Econometrics

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