This paper presents results of an analysis of the labor supply response of 20-year families in the Denver Income Maintenance Experiment. The results indicate that 20-year husbands and wives do not reduce their labor supply relative to control families while 20-year single female heads of families reduce their labor supply by about the same amount as similar families on the 3- and 5-year programs. The results suggest that the limited duration of the 3- and 5-year experiments may not have caused major biases in the estimated treatment effects, although the imprecise estimates resulting from the small sample sizes of the 20-year experiment greatly qualify this conclusion.
The Labor Supply Response of Twenty-Year Families in the Denver Income Maintenance Experiment. Philip K. Robbins. The Review of Economics and Statistics , Vol. 66, No. 3 (Aug., 1984), pp. 491-495. Published by: The MIT Press.