1. Department of Statistics and Econometrics, The Bucharest University of Economic Studies and National Scientific Research Institute for Labour and Social Protection, Department of Education, Training and Labour Market, Bucharest, Romania
2. Department of International Business and Economics, The Bucharest University of Economic Studies and Institute for Economic Forecasting, Romanian Academy, Bucharest, Romania
3. Department of Statistics and Econometrics, Bucharest University of Economic Studies, Bucharest, Romania