Source:
Journal of labor economics [J Labor Econ] 1991 Oct; Vol. 9 (4), pp. 413-26.Publisher: University of Chicago Press Country of Publication: United States NLM ID: 101084446 Publication Model: Print Cited Medium: Print ISSN:
Source:
Genus [Genus] 1987 Jan-Jun; Vol. 43 (1-2), pp. 103-20.Publisher: published by Springer on behalf of the Sapienza University of Rome Country of Publication: Germany NLM ID: 17120050R Publication Model: Print