1. Department of Labor Economics and Industrial Relations, Faculty of Economics and Administrative Sciences, Atatürk University, Erzurum 25240, Turkey
2. Department of Econometrics, Faculty of Economics and Administrative Sciences, Erzurum Technical University, Erzurum 25100, Turkey
3. Department Economics, Faculty of Economics and Administrative Sciences, Atatürk University, Erzurum 25240, Turkey