1. ORSTAT, Faculty of Economics and Business and Belgium Leuven Statistics Research Center (LSTAT), KU Leuven, Belgium ()
2. Department of Mathematics, Imperial College, London SW7 2AZ, United Kingdom ()
3. LIRIS, Faculty of Economics and Business and Leuven Statistics Research center (LSTAT), KU Leuven, Belgium School of Management, University of Southampton, United Kingdom ()