1. Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, The Netherlands
2. Chalmers University of Technology and University of Gothenburg, Department of Mathematical Sciences, Gothenburg, Sweden
3. Institut de Statistique, Biostatistique, et Sciences Actuarielles, Université catholique de Louvain, Louvain-la-Neuve, Belgium
4. Department of Mathematics and Statistics, Fylde College, Lancaster University, Lancaster, UK