TY JOUR TI THE USE OF OUTSOURCING AS A FACTOR IN IMPROVING THE EFFECTIVENESS OF THE ORGANIZATION’S MANAGEMENT SYSTEM KW outsourcing KW management system KW competitiveness KW transaction costs KW personnel outsourcing KW marketing services JO MOSCOW ECONOMIC JOURNAL AU Iskandaryan, G.O. AU Ostrovskaya, A.S. AU Bedakova, A.A. PY 2025 IS 10 PB Electronic science