Sind die so genannten Leerverkäufe Mitverursacher der Finanzkrise und sollten deshalb Wetten auf sinkende Kurse verboten werden? Andre Horovitz, Financial Risk Fitness GmbH, verdeutlicht in seinem Beitrag, dass auch Leerverkäufe und "leer geschlossene" CDS für Unternehmen sinnvoll sein...

We model the evolution of the number of individuals that are reported to be sick with COVID-19 in Germany. Our theoretical framework builds on a continuous time Markov chain with four states: healthy without infection, sick, healthy after recovery or after infection but without symptoms and...

Many countries consider the lifting of restrictions of social contacts (RSC). We quantify the effects of RSC for Germany. We initially employ a purely statistical approach to predicting prevalence of COVID19 if RSC were upheld after April 20. We employ these findings and feed them into our...