1. Self-selection and the earnings of immigrants;Borjas;The American Economic Review,1987
2. Sample selection bias with multiple selection rules: An application to student aid grants;Catsiapis;Journal of Econometrics,1982
3. High school achievement: Public, catholic and private schools compared;Coleman,1982
4. The economics of schooling: Production and efficiency in the public schools;Hanushek;Journal of Economic Literature,1986
5. Sample selection bias as specification error;Heckman;Econometrica,1979