共 15 条
- [1] ANGRIST J, 1989, NBER2991 WORK PAP
- [2] BOUND J, 1989, UNPUB CHANGES STRUCT
- [3] Branson H. W., 1988, NBER WORKING PAPER S
- [4] BRANSON WH, 1986, NBER1972 WORK PAP
- [5] Freeman Richard B., 1991, IMMIGRATION TRADE LA, P235
- [7] GROSSMAN GM, 1987, J INT EC INTEGRATION, V2, P1
- [9] HOOPER P, 1987, 316 INT FIN DISC PAP
- [10] Katz L. F., 1989, J JPN INT ECON, V3, P522