Abstract:By constructing, estimating, calibrating and simulating of the two-country DSGE model, this Paper analyzes the formation mechanism of equilibrium exchange rate and interest rate and the main reasons of disequilibrium were happened. Base on model simulation, the main conclusions include: firstly, in closed or small open economy, with foreign interest rate is considered as exogenous variable, domestic interest rate and exchange rate achieve equilibrium at the same time. When exchange rate deviates from its equilibrium level, domestic interest rate would miss its equilibrium level as well, and vice versa. The pressure of domestic interest rate increasing and currency appreciation appears simultaneously. It suggests that when analyzing equilibrium exchange rate and interest rate, the relations between exchange rate and interest rate have to be taken into account.Through the domestic interest rate and exchange rate policy coordination, achieve domestic interest rate and exchange rate equilibrium simultaneously. Secondly, under international monetary environment, whether exchange rate will achieve its equilibrium level is not only associates with the state of domestic interest rate, but also relates to the state of foreign interest rate. When foreign interest rate imbalance, and there is lack of coordination and cooperation mechanisms between the two country's monetary policy, the domestic interest rate and exchange rate equilibrium will become an impossible task. Thirdly, for the optimal path adjustment of exchange rate and interest rate imbalances, the model suggests that it should adjust the one which has more disequilibrium than the other.
Key Words:Equilibrium Exchange Rate; Equilibrium Interest Rate; Monetary Policy
JEL Classification:E47, E52, F20 |