Swiss National Science Foundation and German Research Foundation (D-A-CH-Agreement). Project duration from October 2015 – September 2018. Leitung: Prof. Dr. Ulf Liebe (other subprojects by Prof. Dr. Andreas Diekmann, ETH Zurich, Prof. Dr. Karin Kurz, University of Göttingen, Prof. Dr. Peter Preisendörfer, University of Mainz)