共 18 条
[11]
Spatial spillovers and innovation activity in European regions
[J].
ENVIRONMENT AND PLANNING A-ECONOMY AND SPACE,
2005, 37 (10)
:1793-1812
[12]
Innovation and spillovers in regions: Evidence from European patent data[J] . Laura Bottazzi,Giovanni Peri.European Economic Review . 2002 (4)
[16]
International R&D spillovers[J] . David T. Coe,Elhanan Helpman.European Economic Review . 1995 (5)