政府科技资助对企业研发投入的影响——基于Heckman样本选择模型的研究
정부과기자조대기업연발투입적영향——기우Heckman양본선택모형적연구
The Effect of Public Subsidies on Firm's R&D Input——Based on Heckman Sample Selection Model
저자의 최근 논문