共 50 条
- [3] SUNK COSTS AND NATURAL ENTRY BARRIERS JAHRBUCHER FUR NATIONALOKONOMIE UND STATISTIK, 1988, 204 (06): : 508 - 517
- [4] FIXED COSTS, SUNK COSTS, ENTRY BARRIERS, AND SUSTAINABILITY OF MONOPOLY QUARTERLY JOURNAL OF ECONOMICS, 1981, 96 (03): : 405 - 431