Modern Portfolio Theory (MPT) provides an elegant mathematical framework for the efficient portfolio allocation problem. Despite its exceptional popularity, MPT poses a number of well-documented problems in practical applications. Especially the fact that it generates notoriously extreme and...

Aufgrund des strategischen Potenzials und des geschäftlichen Nutzens von Big Data richten Unternehmen vermehrt ihre Aufmerksamkeit auf Big Data Analytics. Der Wert von Big Data Analytics, zum Beispiel zum Erfassen von Kundenwünschen und zum Liefern von maßgeschneiderten Diensten, scheint...

This dissertation consists of five distinct empirical papers covering two large areas of research that are rather independent from each other: the economics of ageing and the economics of innovation. The first three chapters cover the impact of intergeneration interaction on the parents of adult...

The PhD studies different empirical methods to detect bid-rigging cartels. It shows first that simple statistical screens perform very well to detect bid-rigging infringement. Second, the econometric method of Bajari, well established in the literature, produces poor results.