共 50 条
- [14] R&D cooperation and spillovers: Some empirical evidence from Belgium AMERICAN ECONOMIC REVIEW, 2002, 92 (04): : 1169 - 1184
- [15] Spillovers, appropriability, and R&D JOURNAL OF ECONOMICS-ZEITSCHRIFT FUR NATIONALOKONOMIE, 2002, 75 (01): : 1 - 32