Knowledge spillovers and patent citations: trends in geographic localization, 1976-2015
Sokbae (Simon) Lee () and
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Hyuk-Soo Kwon: Institute for Fiscal Studies
Jihong Lee: Institute for Fiscal Studies
Sokbae (Simon) Lee: Institute for Fiscal Studies and Columbia University and IFS
Ryungha Oh: Institute for Fiscal Studies
No CWP58/19, CeMMAP working papers from Centre for Microdata Methods and Practice, Institute for Fiscal Studies
This paper examines the trends in geographic localization of knowledge spillovers via patent citations, extracting multiple cohorts of new sample US patents from the period of 1976-2015. Despite accelerating globalization and widespread per-ception of the “death of distance,” our matched-sample study reveals signi?cant and growing localization e?ects of knowledge spillovers at both intra- and international levels after the 1980s. Increased localization e?ects have been accompanied by greater heterogeneity across states and industries. The results are robust to various methods of proxying the existing geography of knowledge production.
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