TY JOUR TI SYSTEM FACTORS AND CAUSES OF TURBULENCE AS A MEASURE OF RANDOMNESS AND UNCERTAINTY OF DEVELOPMENT OF ECONOMY KW economic turbulence KW institutional competition KW sustainable development KW the recession JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Schetinina, E.. AU Kucheryavenko, S.. AU Klimova, T.. AU Konnova, A.. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov