1. Senior Lecturer in Quantitative Methods; Max Planck Institute of Economics; 07745 Jena Germany
2. EQM Department; University of Westminster; London NW1 5LS UK
3. Professor of Economics, Department of Economics and Finance; LUISS University; 00198 Rome Italy
4. Senior Lecturer in Economics; Birkbeck, University of London; London WC1E 7HX UK