TY JOUR TI Adaptation of pricing mechanisms in long-term gas contracts to geopolitical risks: analysis of oil and gas market asymmetry KW long-term gas contracts KW oil price indexation (OPI) KW geopolitical risks (GPR) KW hybrid pricing KW Title Transfer Facility (TTF) KW Japan Korea Marker (JKM) KW oil and gas market asymmetry KW adaptation of contractual mechanisms JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Gavrikova, N.V. AU Gusarevich, A.V. AU Tel'piz, G.A. PY 2026 IS 0 PB ITBO University