共 10 条
[1]
BAJ J, 1991, FEASIBILITY STUDY US
[3]
Corson W., 1984, EVALUATION CHARLESTO
[4]
CORSON W, 1989, 893 US DEP LAB
[6]
HECKMAN JJ, 1976, ANN ECON SOC MEAS, V5, P475
[7]
JOHNSON TR, 1991, UI914 US DEP LAB OCC
[10]
*WA STAT EMPL SEC, 1992, COV EMPL PAYR WA STA, V185