共 53 条
[42]
Klepper S., 1997, IND CORP CHANGE, V6, P379, DOI DOI 10.1093/ICC/6.2.379
[44]
Levin RichardC., 1987, BROOKINGS PAP ECO AC, V3, P783
[46]
Moreno R., 2007, DISCUSSION PAPERS EN
[47]
Sampat B.N., 2004, Handbook of Quantitative Science and Technology Research