Using density forecasts, we compare the predictive performance of duration models that have been developed for modelling intra-day data on stock markets. The compared models are the autoregressive conditional duration (ACD) models, their logarithmic versions, in each case with three...

Zusammenfassung Während die qualifikatorische Lohnstruktur in Deutschland in den vergangenen beiden Jahrzehnten relativ stabil war, mußte vor allem bei den unteren Qualifikationsgruppen ein deutlicher Beschäftigungsverlust konstatiert werden. In diesem Beitrag werden die Wirkungen des...

Summary Data collecting institutions use a large range of masking procedures in order to protect data against disclosure. Generally, a masking procedure can be regarded as a kind of data filter that transforms the true data generating process. Such a transformation severely affects the quality...

Summary This paper surveys the empirical evidence on causal effects of education on earnings for Germany and compares alternative studies in the light of their underlying identifying assumptions. We work out the different assumptions taken by various studies, which lead to rather different...