1. Charles University, Department of Probability and Mathematical Statistics, Praha, Czech Republic
2. CERGE-EI, A joint workplace of Charles University and the Economics Institute of the Czech Academy of Sciences, Prague, Czech Republic
3. C.E.P.R., London
4. University of Utah, Department of Mathematics, Salt Lake City UT, USA
5. Cardiff Business School, Cardiff University, Cardiff, UK
6. Department of Economics, University of Birmingham, Birmingham, UK