TY JOUR TI Assessment of the impact of macroeconomic and market factors on airline fleet renewal planning KW fleet renewal KW import substitution KW aviation industry KW macroeconomic factors KW SSJ-100 KW MC-21 KW leasing KW sanctions KW operational efficiency KW Russian airlines JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Bryuhanov, A.A. PY 2025 IS 0 PB ITBO University