共 50 条
- [32] THE VALUATION OF RESEARCH-AND-DEVELOPMENT FIRMS WITH RESEARCH-AND-DEVELOPMENT LIMITED PARTNERSHIPS ACCOUNTING REVIEW, 1991, 66 (01): : 1 - 21
- [34] Are the economics of pharmaceutical research and development changing?Productivity, patents and political pressures PharmacoEconomics, 2004, 22 : 15 - 24
- [36] THE VALUATION OF RESEARCH-AND-DEVELOPMENT FIRMS WITH RESEARCH-AND-DEVELOPMENT LIMITED PARTNERSHIPS - COMMENT ACCOUNTING REVIEW, 1992, 67 (02): : 440 - 442
- [38] TECHNOLOGICAL OPPORTUNITY AND SPILLOVERS OF RESEARCH-AND-DEVELOPMENT - EVIDENCE FROM FIRMS PATENTS, PROFITS, AND MARKET VALUE AMERICAN ECONOMIC REVIEW, 1986, 76 (05): : 984 - 1001