Seminar for Statistics, Department of Mathematics, ETH Zürich, Zürich 8092, Switzerland Department of Economics, University of Zürich, Zürich 8006, Switzerland.|Seminar for Statistics, Department of Mathematics, ETH Zürich, Zürich 8092, Switzerland.|Institute of Evolutionary Biology (CSIC-UPF), Universitat Pompeu Fabra, Barcelona 08003, Spain Institució Catalana de Recerca i Estudis Avançats (ICREA) Center for Genomic Regulation (CRG), Barcelona Biomedical Research Park (PRBB), Barcelona 08003, Spain.|Department of Economics, University of Mainz, Mainz, Germany.|Department of Economics, University of Zürich, Zürich 8006, Switzerland.|Seminar for Statistics, Department of Mathematics, ETH Zürich, Zürich 8092, Switzerland.