共 44 条
- [31] Mairesse J., 2010, HDB EC INNOVATION, P1034
- [32] IMITATION COSTS AND PATENTS - AN EMPIRICAL-STUDY [J]. ECONOMIC JOURNAL, 1981, 91 (364) : 907 - 918
- [33] HOW RAPIDLY DOES NEW INDUSTRIAL-TECHNOLOGY LEAK OUT [J]. JOURNAL OF INDUSTRIAL ECONOMICS, 1985, 34 (02) : 217 - 223
- [36] INCREASING RETURNS AND LONG-RUN GROWTH [J]. JOURNAL OF POLITICAL ECONOMY, 1986, 94 (05) : 1002 - 1037
- [39] Who co-operates for innovation, and why - An empirical analysis [J]. RESEARCH POLICY, 2002, 31 (06) : 947 - 967
- [40] Thursby J., 2006, Science Magazine, V314, P1547