1. 1972. Some mathematical models of race discrimination in the labor market. In Racial Discrimination in Economic Life, (ed.). D. C. Heath: Lexington, MA; 187–203.
2. 1957. The Economics of Discrimination. University of Chicago Press: Chicago, IL.
3. The Effect on White Incomes of Discrimination in Employment
4. Wage Discrimination: Reduced Form and Structural Estimates
5. , . 1984. Classification and Regression Trees. Wadsworth: Belmont, CA.