1. School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
2. Research Division, Sveriges Riksbank, Stockholm, Sweden
3. Discipline of Business Analytics, University of Sydney, Sydney, Australia
4. Department of Statistics, Stockholm University, Stockholm, Sweden
5. Department of Computer and Information Science, Linköping University, Linköping, Sweden
6. School of Economics, UNSW Business School, University of New South Wales, Kensington, Australia