This paper generalizes the ACD models of Engle and Russell (1998) using the so-called q-Weibull distribution as the conditional distribution. The new specification allows the hazard function to be non-monotonic. We document that the q-Weibull distribution recently suggested in physics as a...

Credit Ratings sind das bedeutendste Informationsinstrument bezüglich der Bonität eines Schuldners. Christine Ott untersucht in einer breit angelegten Studie, inwieweit sie für die Bewertung börsennotierter deutscher Unternehmen relevant sind. Auf der Grundlage finanzierungstheoretischer...

This paper provides high-dimensional and flexible importance sampling procedures for the likelihood evaluation of dynamic latent variable models involving finite or infinite mixtures leading to possibly heavy tailed and/or multi-modal target densities. Our approach is based upon the efficient...