AB This paper introduces an instrumental variables estimator for the clTcct of a binary treatment on the quanlilcs of potential outcomes. The quantile treatment effects (QTE) estimator accommodates exogenous covariatcs and reduces to quantile regression as a special case when treatment status is exogenous. Asymptotic distribution theory and computational methods are derived. QTE minimizes a picccwisc linear objective function for which a local minimum can be obtained using a modified

more »

... obcrts algorithm. The QTE estimator is illustrated by estimating the effect of childbcaring on the distribution of family income. Abbring, Jaap H.