共 46 条
- [35] LICHTENBERG FR, 1988, AM ECON REV, V78, P550
- [36] The difficulties in assessing the impact of EU framework programmes [J]. RESEARCH POLICY, 1998, 27 (06) : 599 - 610
- [38] Martin S., 1996, European Journal of Political Economy, V11, P733
- [39] COLLUSION AND RESEARCH JOINT VENTURES [J]. JOURNAL OF INDUSTRIAL ECONOMICS, 2009, 57 (04) : 768 - 784