102现正讨论Papers
IZA Discussion Paper No. 85
published in: Oxford Bulletin of Economics and Statistics, 2000, 62 (s1), 801-835
IZA Discussion Paper No. 57
published in: Journal of Human Resources, 2000, 35 (3), 550-569;
seeIZA Reprints 54/00
seeIZA Reprints 54/00
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