Travel arrangements and flight ticket booking via inter-net is widely used nowadays and follow already certain standards. Although increasing activity for multimedia/web education components can be observed, we are far away from standards in this important area. Statistics can possibly profit...

Credit scoring methods aim to assess the default risk of a potential borrower. This involves typically the calculation of a credit score and the estimation of the probability of default. One of the standard approaches is logistic discriminant analysis, also referred to as logit model. This model...

We introduce and analyse numerical methods for the treatment of inverse problems, based on an adaptive wavelet Galerkin discretization. These methods combine the theoretical advantages of the wavelet-vaguelette decomposition (WVD) in terms of optimally adapting to the unknown smoothness of the...

Zur Beurteilung und Prognose der konjunkturellen Entwicklung werden in Deutsehland eine Reihe unterschiedlicher Indikatoren verwendet. In dieser Studie werden graphische und ökonometrische Verfahren angewandt, um die Prognosequalität der rneist beachteten Konjunkturindikatoren in Dentschland...

We study whether selection affects motivation. In our experiment subjects first answer a personality questionnaire. They then play a 3-person game. One of the three players decides between an outside option assigning him a positive amount, but leaving the two others empty-handed and allowing one...

We formally represent the effects of prior gains and losses in a simple dynamic preference calculus based on prospect theorys value function and thoughts adapted from aspiration level theories. We investigate our predictions in questionnaire experiments. Since we document a strong effect of...