Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/189794 
Year of Publication: 
2017
Series/Report no.: 
cemmap working paper No. CWP55/17
Publisher: 
Centre for Microdata Methods and Practice (cemmap), London
Abstract: 
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.
Subjects: 
Innovation
knowledge spillovers
patent citation
agglomeration
networkindex
farness
JEL: 
C36
C81
O33
O34
O51
Persistent Identifier of the first edition: 
Document Type: 
Working Paper

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