共 50 条
- [2] The Level of Inventive Activity [J]. JOURNAL OF THE PATENT OFFICE SOCIETY, 1954, 36 (12): : 883 - 899
- [3] THE LEVEL OF INVENTIVE ACTIVITY [J]. REVIEW OF ECONOMICS AND STATISTICS, 1954, 36 (02) : 183 - 190
- [5] PATENTS AND INVENTIVE ACTIVITY [J]. JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH, 1993, 52 (04): : 229 - 233
- [6] ECONOMIC SOURCES OF INVENTIVE ACTIVITY [J]. JOURNAL OF ECONOMIC HISTORY, 1962, 22 (01): : 1 - 20
- [7] Microgeography and the Direction of Inventive Activity [J]. MANAGEMENT SCIENCE, 2018, 64 (09) : 4348 - 4364
- [10] POPULATION AGING AND INVENTIVE ACTIVITY [J]. MACROECONOMIC DYNAMICS, 2022, 26 (05) : 1127 - 1161