This paper examines the effect of the Earned Income Tax Credit (EITC) and welfare programs on the labor supply of single mothers. The EITC consists of an earning subsidy program in the form of marginal tax credits to the working poor. The presence of different marginal tax rates at the various...

In this chapter, we consider the nonparametric estimation of the average treatment effect (ATE) based on direct estimation of the conditional treatment effect. We establish the asymptotic distribution of the proposed ATE estimator. We also consider consistent testing for a parametric functional...