In this paper we investigate the sources of the important shifts in the volatility of U.S. macroeconomic variables in … the postwar period. To this end, we propose the estimation of DSGE models allowing for time variation in the volatility of … investment specific technology shocks account for most of the sharp decline in volatility of the last two decades …

is often preceeded by an increase in market volatility and a withdrawal of liquidity, and that liquidity shocks play an …