The paper proposes a numerical solution method for general equilibrium models with a continuum of heterogeneous agents that combines elements of projection and of perturbation methods. The basic idea is to solve first for the stationary solution of the model, without aggregate shocks but with...

The lumpy nature of plant-level investment is generally not taken into account in the context of New Keynesian monetary theory (see, e.g., Christiano et al., 2005; Woodford, 2005). Our main result shows that if this theory is augmented by a standard model of lumpy investment, monetary policy shocks...

The book uses the methods of spectral analysis to establish a set of stylized facts concerning the cyclical properties of the most important economic aggregates of Germany and the US. To explain these stylized facts, a series of investment cycle models is developed and evaluated. Thereby, the...