Localized knowledge spillovers: Evidence from the spatial clustering of R&D labs and patent citations
2020 ◽
Vol 81
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pp. 103490
2014 ◽
Vol 96
(5)
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pp. 967-985
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2007 ◽
Vol 16
(8)
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pp. 595-633
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2000 ◽
Vol 90
(2)
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pp. 215-218
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2005 ◽
Vol 95
(1)
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pp. 465-466
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