1. Issues in the analysis of selection bias;Barnow;Paper given at the American Economic Association meetings,1978
2. Subsidization and investment in postsecondary education with application using the U.S. national longitudinal study of the 1972 high school class;Catsiapis,1980
3. Sample selection bias with two selection rules: An application to student-aid grants;Catsiapis,1978
4. Sample selection bias as specification error: Comment;Green;Econometrica,1981
5. Missing data and self-selection in large panels;Griliches,1977