2David T. Coe,Elhanan Helpman.International R&D spillovers[J].European Economic Review.1995(5)
3NigelDriffield,James H.Love.Foreign Direct Investment, Technology Sourcing and Reverse Spillovers[J]. The Manchester School . 2003 (6)
4Frank Lichtenberg,Bruno van Pottelsberghe de la Potterie.International R&D spiHover:A re-examination. NBER Working Paper 5688 . 1996
5Coe D.T,Helpman E,Alexander W.H.North-South R&D Spillovers. National Bureau of Economic ResearchNo.w 5048 . 1995
6Branstetter L G,Fisman R,Foley C F.Do stronger intellectual property rights increase international technology transfer?Empirical evidence from U.S.firm-level data. Working Paper National Bureau of Economic Research . 2006