Affiliation: | a Katholieke Universiteit Leuven, Faculty of Business and Economics, Naamsestraat 69, 3000 Leuven, Belgium b Universiteit Antwerpen, Faculty of Applied Economics, Prinsstraat 13, 2000 Antwerpen, Belgium c Erasmus Universiteit Rotterdam, Erasmus School of Economics, Postbus 1738, 3000, DR Rotterdam, The Netherlands d Leuven Statistics Research Centre, Naamsestraat 69, 3000 Leuven, Belgium |