[1
]Department of Management University of Turin Turin Italy
[2
]Research Fellow of the Laboratory for International and Regional Economics, Graduate
School of Economics and Management Ural Federal University Ekaterinburg Russia
[3
]Faculty of Economics and Business University of Rijeka Rijeka Croatia
[4
]Department of Economics University of Foggia Foggia Italy
[5
]Department of Economics and Business, University of Sassari Sassari Italy