共 50 条
- [31] INVESTMENT BEHAVIOR BY UNITED-STATES RAILROADS - 1870-1914 JOURNAL OF ECONOMIC HISTORY, 1972, 32 (01): : 412 - 414
- [34] COMPETITION IN THE UNITED-STATES AIRLINE INDUSTRY TRANSPORTATION QUARTERLY, 1991, 45 (02): : 181 - 210
- [36] IMPERFECT ELECTORAL COMPETITION IN UNITED-STATES REVUE FRANCAISE DE SCIENCE POLITIQUE, 1976, 26 (05): : 899 - 928