Tazkia Ayu Lutvia, M. Irwan and Muhamad Baiul Hak (2026) “The Implementation of the ECM Model to Measure Inflation in Indonesia and Its Implications for State Financial Planning: Inflation, Financial Planning”, Al-Kharaj: Journal of Islamic Economic and Business, 8(2). doi: 10.24256/kharaj.v8i2.9851.