The term structure of interest rates with nonlinear adjustment: Evidence from a unit root test in the nonlinear STAR framework

Abstract

This paper investigates the term structure of interest rates in Japan using the unit root test in a nonlinear STAR framework. The results provide strong evidence against the unit root of the yield spread between long-term and short-term interest rates, compared with standard unit root tests assuming only linear adjustment. This finding shows that the term structure of interest rates is stable with nonlinear adjustment.