共 69 条
- [2] Angrist JD, 1996, J AM STAT ASSOC, V91, P444, DOI 10.2307/2291629
- [3] [Anonymous], 1991, 3705 NAT BUR EC RES
- [4] [Anonymous], URBAN UNDERCLASS
- [5] AUGUSTYN M, 1995, CONT PEDIAT, V12, P35
- [8] ACCOUNTING FOR NO-SHOWS IN EXPERIMENTAL EVALUATION DESIGNS [J]. EVALUATION REVIEW, 1984, 8 (02) : 225 - 246
- [9] BORJAS GJ, 1995, AM ECON REV, V85, P365
- [10] Bos J.M., 1999, NEW HOPE PEOPLE LOW