This paper studies how population aging affects macroeconomic performance and the effectiveness of macroeconomic policies. By using a new Keynesian dynamic stochastic general equilibrium model with heterogeneous households, we find that the effectiveness of monetary policy diminishes as...

This paper studies how an aging population affects economic performance and the effectiveness of fiscal and monetary policies. We develop a New Keynesian dynamic stochastic general equilibrium model with heterogeneous households, workers, and retirees. We demonstrate that an increase in the...

This paper revisits the fiscal sustainability condition proposed by Domar (1944). The Domar condition is derived from the government budget constraint and thus focuses on the supply side of the government bond. By considering the demand for the government bond, this paper finds that public debt...