In this article we consider the portfolio selection problem of an agent with robust preferences in the sense of Gilboa and Schmeidler [Itzhak Gilboa, David Schmeidler, Maxmin expected utility with non-unique prior, Journal of Mathematical Economics 18 (1989) 141-153] in an incomplete market....

Demographic projections of future mortality rates involve a high level of uncertainty and require stochastic mortality models. The current paper investigates forward mortality models driven by a (possibly infinite-dimensional) Wiener process and a compensated Poisson random measure. A major...

Die öffentliche Kritik, die 2010 der Senkung des Umsatzsteuer-Tarifs für Hotelübernachtungen von 19% auf 7% folgte, war insoweit überraschend, als der traditionellen Inzidenz-Hypothese zufolge Tarifsenkungen der Umsatzsteuer durch Preissenkungen Konsumenten zugutekommen. Sie wäre berechtigt...

We model aggregate credit losses on large portfolios of financial positions contracted with firms subject to both cyclical default correlation and direct default contagion processes. Cyclical correlation is due to the dependence of firms on common (macro-) economic factors; credit contagion...

Credit contagion refers to the propagation of economic distress from one firm or sovereign government to another. In this paper we model credit contagion phenomena and study the fluctuation of aggregate credit losses on large portfolios of financial positions. The joint dynamics of firms' credit...

The paper provides an axiomatic characterization of dynamic risk measures for multi-period financial positions. For the special case of a terminal cash flow, we require that risk depends on its conditional distribution only. We prove a representation theorem for dynamic risk measures and...

[Schlussbetrachtung] Die bisher in den Steuerwissenschaften publizierte Spenden-Literatur verzichtete sowohl auf eine Modellierung der Steuerwirkungen als auch auf die Berücksichtigung umsatzsteuerlicher Konsequenzen. Der vorliegende Beitrag schließt diese Lücke, indem er einer detaillierten...