affiliation not provided to SSRN, affiliation not provided to SSRN, Graz University of Technology - Institute of Statistics, affiliation not provided to SSRN, Center for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), affiliation not provided to SSRN, Helmholtz Center for Materials and Energy - Institute of Applied Materials, Helmholtz Center for Materials and Energy - Institute of Applied Materials, Helmholtz Center for Materials and Energy - Institute of Applied Materials, Center for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), Ulm University - Institute of Stochastics, Ulm University and affiliation not provided to SSRN