Mikhail Evgenievich Kosov
1) Department of Finance and Prices, Plekhanov Russian University of Economic, Moscow, Russia. 2) Financial University under the Government of the Russian Federation, Moscow,
Russian Federation

Vladimir Vladimirovich Eremin
Financial University under the Government of the Russian Federation, Moscow,
Russian Federation

Sergey Alekseevich Pobyvaev
Financial University under the Government of the Russian Federation, Moscow,
Russian Federation

Tural Sokhbat Ogly Gaibov
Financial University under the Government of the Russian Federation, Moscow,
Russian Federation