1. Department of Statistics and Econometrics, The Bucharest University of Economic Studies, 010552 Bucharest, Romania
2. Department of Education, Training and Labour Market, National Scientific Research Institute for Labour and Social Protection, 010643 Bucharest, Romania
3. Doctoral School of Cybernetics and Statistics, Bucharest University of Economic Studies, 010374 Bucharest, Romania
4. Department of Informatics, Statistics and Mathematics, Romanian-American University, 012101 Bucharest, Romania
5. Doctoral School of Finance, Western University of Timisoara, 300223 Timisoara, Romania
6. The Financial Supervisory Authority, 050092 Bucharest, Romania
7. Doctoral School of Economics II, Bucharest University of Economic Studies, 010374 Bucharest, Romania