1. Department of Economics and Finance University of Rome “Tor Vergata” Rome Italy
2. Korea Institute for Health and Social Affairs (KIHASA) Sejong City South Korea
3. University of Southern California Los Angeles California USA
4. RAND Corporation Arlington Virginia USA
5. Centre for Economic and International Studies. University of Rome “Tor Vergata” Rome Italy
6. Sol Price School of Public Policy University of Southern California Los Angeles California USA