In Japan, like many other industrialized countries, output volatility declined dramatically in the 1980s. In order to investigate the cause of this decline, we decompose the variance of output growth by frequency. Our important findings are: (1) The total variance of output growth decreased,...

This paper analyzes the time-varying parameter vector autoregressive (TVP-VAR) model for the Japanese economy and monetary policy. The parameters are allowed to follow a random walk process and estimated using the Markov chain Monte Carlo method. The empirical result reveals the time-varying...