We study the problem of maximizing expected utility of terminal wealth under constant and proportional transactions costs in a multidimensional market with prices driven by a factor process. We show that the value function is the unique viscosity solution of the associated quasi-variational...

We study a portfolio optimization problem in a market which is under the threat of crashes. At random times, the investor receives a warning that a crash in the risky asset might occur. We construct a strategy which renders the investor indifferent about an immediate crash of maximum size and no...

We study a portfolio optimization problem in a financial market which is under the threat of crashes. At random times, the investor receives warnings that a bubble has formed in the market which may lead to a crash in the risky asset. We propose a regime switching model for the warnings and we...

Quantitative Datenanalyse ist ein unverzichtbares Werkzeug in der digitalen Wissensgesellschaft. Dieses Lehrbuch bietet eine leicht verständliche Einführung in die Thematik für Studium und Berufsalltag. Besondere Aufmerksamkeit wird dabei der Abhängigkeitsmessung gewidmet, da sie...

Verl.Beschr.: Das Lehrbuch umfasst die zentralen Aspekte der Beschreibenden und der Schliessenden Statistik und betont die inhaltlichen Bezüge zwischen beiden Bereichen. Schwerpunkte werden in den Bereichen der Stichprobenziehung sowie der Abhängigkeitsmessung gelegt, da diese Themengebiete...

We argue that the complex interactions of competitive heterogeneous firms lead to a statistical equilibrium distribution of firms? profit rates, which turns out to be an exponential power (or Subbotin) distribution. Moreover, we construct a diffusion process that has the Subbotin distribution as...

We consider a portfolio optimization problem in a Black-Scholes model with n stocks, in which an investor faces both fixed and proportional transaction costs. The performance of an investment strategy is measured by the average return of the corresponding portfolio over an infinite time horizon....