1. Econometric Institute, Erasmus University , Burg. Oudlaan 50 , 3062 PA Rotterdam, The Netherlands
2. Department of Economics, Ca’ Foscari University , Cannaregio 873 , 30121 Venice, Italy
3. Department of Biomedical Data Sciences, Leiden University Medical Center , Einthovenweg 20 , 2333 ZC Leiden, The Netherlands