Measuring the Intertemporal Elasticity of Substitution for Consumption: Some Evidence from Japan

Abstract

The purpose of this paper is to present improved estimates of the intertemporal elasticity of substitution (IES) for Japan assuming a constant relative risk aversion (CRRA) utility function. The estimates of the IES we obtain range from 0.2 to 0.5 when we use quarterly consumption data and the Continuous Updating Estimator (CUE). We find that the IES is weakly identified when we employ the two-step GMM estimator, while the CUE can identify the IES. Moreover, we also find that using consumption data of different frequencies leads to quite different estimates of the IES.Intertemporal Elasticity of Substitution, Relative Risk Aversion, Generalized Method of Moments, Continuous Updating Estimator, Weak Identification