Using a time-varying parameter vector autoregression (TVP-VAR) with a new sign restriction framework, we study the changing effectiveness of the Bank of Japan's Quantitative Easing policies over time. We analyse the Zero-Interest Rate Policy from 1999 to 2000, the Quantitative Easing Policy from...

Using post-1995 Japanese data we propose a theory-based sign-restriction SVAR approach to identify monetary policy shocks when the economy is at the zero-lower bound. The identifying restrictions accord with predictions of corresponding DSGE models. Our results show that while a quantitative...