The Estimation of Iranian Money Demand Function: Smooth Transition Autoregression with Interest Rate Threshold

Abstract

The main objective of this study is to evaluate the effect of saving rate on money demand function’s regime change in the framework of nonlinear smooth transition auto-regressive method covering the period 1352-1396. In this regard, the linear model was tested against nonlinear model and it revealed that nonlinear model is better. Then, the nonlinear logistic model is distinguished by using Trasvirta test. The results indicated that error adjustment speed in linear models is different from nonlinear ones. Adjustment speed is different in various interest rates. If interest rate of bank deposits is very low, money demand function will quickly adjust itself. As the interest rate of deposits increase, the adjustment speed of money demand function will decrease.

Keywords

• money demand smooth transition autoregressive nonlinear estimation