TY JOUR TI Methodological tools for horizontal and vertical economic analysis of the state of the arctic transport and logistics system KW horizontal analysis KW vertical analysis KW Arctic TLS KW seasonal decomposition KW navigation windows KW infrastructure segments KW Arctic cargo flows KW Northern Sea Route JO Theoretical economics AU Schebarova, N.N. AU Vaseha, M.V. PY 2026 IS 0 PB Yaroslavl State Technical University