共 32 条
- [2] Arrow K.J., 1962, The Rate and Direction of Inventive Activity: Economic and Social Factors, NBER Chapters, DOI DOI 10.1515/9781400879762-024
- [3] Estimation of average treatment effects based on propensity scores [J]. STATA JOURNAL, 2002, 2 (04) : 358 - 377
- [4] Blundell R., 2010, FISC STUD, V21, P427, DOI DOI 10.1111/J.1475-5890.2000.TB00031.X
- [5] Boeing P., 2014, 14103 ZEW
- [6] Bound John., 1984, RD PATENTS PRODUCTIV, P21
- [9] Do public subsidies stimulate private R&D spending? [J]. RESEARCH POLICY, 2008, 37 (03) : 371 - 389
- [10] González X, 2005, RAND J ECON, V36, P930