Estimating Interest Rate Setting Behavior in Korea: An Ordered Probit Model Approach

We investigate the Bank of Korea's interest rate setting behavior using a discrete choice model, where the Monetary Policy Committee revises the target policy interest rate only when the gap between the current market interest rate and the optimal rate exceeds a certain threshold value. Using monthly frequency data since 2000, we evaluate an array of ordered probit models in terms of the in-sample fit. We find important roles for the output gap, inflation, and the won depreciation rate against the US dollar. We also implement out-of-sample forecast exercises with September 2008 (Lehman Brothers Bankruptcy) for a split point, finding good out-of-sample predictability of our models.