The Labor Supply Response of Twenty-Year Families in the Denver Income Maintenance Experiment
分析丹佛收入维持实验中二十年期家庭的劳动供给变化，发现夫妻劳动供给未减少，而单身女性户主减少幅度与三五年期实验类似，但小样本导致估计不精确。
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 3and 5-year programs. The results suggest that the limited duration of the 3and 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.