Knowledge spillovers and patent citations : trends in geographic localization, 1976-2015

Hyuk-Soo Kwon, Jihong Lee, Sokbae Lee, Ryungha Oh

This paper examines the trends in geographic localization of knowledge spillovers via patent citations, considering US patents from the period of 1976-2015. Despite accelerating globalization and widespread perception of the \death of distance," our multi-cohort \matched-sample" study reveals significant and growing localization effects of knowledge spillovers at both intra- and international levels after the 1980s. We also develop a novel network index based on the notion of \farness," which an instrumental variable estimation shows to be a significant and sizable determinant of the observed trends at the state-sector level.

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Year of publication:	30 November 2017
Authors:	Kwon, Hyuk-Soo ; Lee, Jihong ; Lee, Sokbae ; Oh, Ryungha
Publisher:	London : Cemmap, Centre for Microdata Methods and Practice, The Institute for Fiscal Studies, Department of Economics, UCL
Subject:	Innovation \| knowledge spillovers \| patent citation \| agglomeration \| networkindex \| farness \| Patent \| Wissenstransfer \| Knowledge transfer \| Spillover-Effekt \| Spillover effect \| Bibliometrie \| Bibliometrics \| Regionales Cluster \| Regional cluster \| Agglomerationseffekt \| Agglomeration effect \| Industrieforschung \| Industrial research \| Innovationsdiffusion \| Innovation diffusion