1. Department of Finance, Babes Bolyai University, Cluj-Napoca, Romania
2. Laboratory of Economics of Orleans, Universite d’Orleans Faculte de Droit d’Economie et de Gestion, Orleans, France
3. Department of Statistics, Forecasting and Mathematics, Babeş Bolyai University, Cluj-Napoca, Romania
4. Academy of Economic Studies, Department of Finance, The Bucharest University of Economic Studies, Bucharest, Romania