1. Department of Statistical Sciences University of Rome “La Sapienza” Rome Italy
2. Department of Bio‐Sciences University of Molise Campobasso Italy
3. Department of Economics and Finance University of Rome “Tor Vergata” Rome Italy
4. Department of Economics, Management and Statistics University of Palermo Palermo Italy
5. Department of Epidemiology and Public Health Swiss TPH Basel Basel Switzerland
6. Department of GEPLI Libera Universitá Maria Ss Assunta Rome Italy
7. Department of Mathematics University of Bergen Bergen Norway
8. IAC ‐ CNR Institute of Applied Computing “M. Picone” Rome Italy