[1] Inst Control Syst, 9 Bakhtiyar Vahabzadeh, Baku 1141, Azerbaijan
[2] King Abdullah Petr Studies & Res Ctr, Energy Macro & Microecon Dept, POB 88550, Riyadh 11672, Saudi Arabia
[3] George Washington Univ, Econ Dept, Res Program Forecasting, 2115 G St NW, Washington, DC 20052 USA
[4] Azerbaijan State Univ Econ UNEC, UNEC Empir Res Ctr, Istiqlaliyyat Str 6, AZ-1141 Baku, Azerbaijan
[5] Vistula Univ, Fac Econ & Int Relat, Stoklosy 3, PL-02787 Warsaw, Poland
[6] Baku Engn Univ, Dept Finance, Hasan Aliyev 120, AZ-0101 Khirdalan, Azerbaijan