共 33 条
- [21] Why are governmental R&D and private R&D complements?[J] . Dennis Patrick Leyden,Albert N. Link.Applied Economics . 1991 (10)
- [22] The Relationship Between Federal Contract R&D and Company R&D[J] . Frank R. Lichtenberg.The American Economic Review . 1984 (2)
- [23] Incentives to innovate in a Cournot oligopoly .2 Flavio Delbono,Vincenzo Denicolo. Q. J. Econ . 1991