共 92 条
- [42] PATENT STATISTICS AS ECONOMIC INDICATORS - A SURVEY [J]. JOURNAL OF ECONOMIC LITERATURE, 1990, 28 (04) : 1661 - 1707
- [43] GRILICHES Z, 1987, EC POLICY TECHNOLOGI, P99
- [44] Hatfield DE, 1996, STRATEGIC MANAGE J, V17, P55, DOI 10.1002/(SICI)1097-0266(199601)17:1<55::AID-SMJ788>3.3.CO
- [45] 2-2
- [49] Henderson R., 1994, IND CORP CHANGE, V3, P607, DOI [DOI 10.1093/ICC/3.3.607, 10.1093/icc/33.607, DOI 10.1093/ICC/33.607]
- [50] HENDERSON R, 1993, NBER WORKING PAPER, V4466