Huber, Martin; Mellace, Giovanni - In: Oxford Bulletin of Economics and Statistics 77 (2015) 1, pp. 129-151
type="main" xml:id="obes12056-abs-0001" <title type="main">Abstract</title> <p>In many empirical problems, the evaluation of treatment effects is complicated by sample selection so that the outcome is only observed for a non-random subpopulation. In the absence of instruments and/or tight parametric assumptions, treatment...</p>
