The open economy in the sr The Mundell-Fleming model Model under a floating ex-rate Model under a fixed ex-rate Interest-rate differentials Debate over floating V.s. fixed ex-rate Mundell-Fleming model with changing price level Model in large open economyThe Open Economy in the SR ◼ The Mundell-Fleming Model ◼ Model under a floating ex-rate ◼ Model under a fixed ex-rate ◼ Interest-rate differentials ◼ Debate over floating v.s. fixed ex-rate ◼ Mundell-Fleming model with changing price level ◼ Model in large open economy