This study focuses on the role of heterogeneity in network peer effects by accounting for network-specific factors and different driving mechanisms of peer behavior. We propose a novel Multivariate Instrumental Variable (MVIV) estimator which is consistent for a large number of networks keeping...

Die Übergangsquoten von Studienberechtigten ins Studium variieren erheblich zwischen den 16 Bundesländern: Während in Bayern etwa 80 Prozent der berechtigten SchulabgängerInnen ein Studium aufnehmen, sind es in Nordrhein-Westfalen nur rund 60 Prozent. Im vorliegenden Bericht untersuchen wir,...

The decision to contact a physician and the decision, how often to contact a physician, are based on different decision makers. We introduce a negative binominal distributed hurdle model that specifies the two stages of the decision process as different stochastic processes, and takes also care...

The German apprenticeship training system is generally acknowledged to solve the youth unemployment problem prevalent in many European countries by providing on-the-job training that often leads into subsequent regular employment within the training firms. Little attention has been paid to those...