In this paper we review the evolution of macroeconomic modelling in a policy environment that took place over the past sixty years. We identify and characterize four generations of macro models. Particular attention is paid to the fourth generation - dynamic stochastic general equilibrium...

In this paper we propose a novel methodology to analyze optimal policies under model uncertainty in micro-founded macroeconomic models. As an application we assess the relevant sources of uncertainty for the optimal conduct of monetary policy within (parameter uncertainty) and across models...