We consider two semiparametric models for the weight function in a bias sample model. The object of our interest parametrizes the weight function, and it is either Euclidean or non Euclidean. One of the models discussed in this paper is motivated by the estimation the mixing distribution of...

This paper extends the evaluation of direct and indirect treatment effects, i.e., mediation analysis, to the case that outcomes are only partially observed due to sample selection or outcome attrition. We assume sequential conditional independence of the treatment and the mediator, i.e., the...

In zahlreichen großen Datensätzen von wissenschaftlichem Interesse sind einige Variablen, wie z. B. die Lohnhöhe, top-coded oder rechtszensiert. Zur Analyse von Löhnen auf der Grundlage der IAB-Beschäftigtenstichprobe muss zunächst das Problem der, an der Beitragsbemessungsgrenze der...