TY JOUR TI Model analysis of the OFZ market from the perspective 
of fiscal sustainability of the Russian Federation in 2026: an institutional-quantitative approach KW model analysis KW OFZ market KW federal budget KW tax burden KW de Soto's "vicious circle" models KW portfolio management KW fiscal sustainability JO Journal of Management Studies AU Tebekin, A.V. AU Petrov, V.S. AU Petrova, O.V. PY 2026 IS 12 PB INFRA-M Academic Publishing LLC.