The Empirical Content of the Roy Model
James J. Heckman, Bo E. Honore
Econometrica, Vol. 58, No. 5. (Sep., 1990), pp. 1121-1149.
Stable URL: http://links.jstor.org/sici?sici=0012-9682%28199009%2958%3A5%3C1121%3ATECOTR%3E2.0.CO%3B2-K