My first thanks go to my doctoral supervisors Heinz Gutscher and Theo Wehner. They jointly submitted the National Fund project that underlies this study with me and accompanied it with scientific expertise and personal interest. Special thanks also go to Riccardo Lucchini for his friendly and excellent professional advice, especially in the initial phase of the research design. I am particularly grateful to my fellow doctoral candidates Katrin Wodzicki and Carmen Lebherz, whose expertise, critical eye, and great willingness to help have benefited this work in many ways. Other colleagues at the University of Zurich and ETH Zurich also contributed feedback and individual ideas; they too deserve my thanks.