1. Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, Netherlands.
2. Department of Mathematics, Faculty of Science, University of Zagreb, Zagreb, Croatia.
3. Department of Mathematics and Statistics, University of Jyväskylä, Jyväskylä, Finland.
4. Institute of Statistics & Mathematical Methods in Economics, Vienna University of Technology, Vienna, Austria.
5. Toulouse School of Economics, Université Toulouse 1 Capitole, Toulouse, France.