We study two types of testing problems in a nonparametric additive model setting: We develop methods to test (i) whether an additive component function has a given parametric form and (ii) whether an additive component has a structural break. We apply the theory to a nonparametric extension of...

We provide an axiomatization-based justification for applying the Owen value to decompose R2 in OLS models if prior knowledge can be used to form groups of regressor variables. The assumptions made by the axioms are not only plausible with respect to the variables but also clarify the meaning of...

We show why considering a number of education-dependent covariates in the wage equation decreases coefficient of education in the wage equation. We use a meta-analysis of results for Portugal to show, empirically, that this is the case. The coefficient decreases when we use covariates that can...

Eine Methode, um das systematische und unsystematische Risiko sowie den Einfluss externer Einflussfaktoren auf Aktienrenditen zu bestimmen, ist die Zerlegung der Varianz von Aktienrenditen. Allerdings waren die bisher angewendeten Methoden der Varianzzerlegung nur unzureichend dazu geeignet,...