Borders and Distance in Knowledge Spillovers: Dying over Time or Dying with Age? - Evidence from Patent Citations
2006 ◽
Vol 15
(8)
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pp. 753-776
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2007 ◽
Vol 16
(8)
◽
pp. 595-633
◽
2000 ◽
Vol 90
(2)
◽
pp. 215-218
◽
2005 ◽
Vol 95
(1)
◽
pp. 465-466
◽
2013 ◽
Vol 2013
(1)
◽
pp. 12227