We theoretically analyze the interactions between asset prices, nancial speculation, and macroeconomic outcomes when output is determined by aggregate demand. If the interest rate is constrained, a rise in the risk premium lowers asset prices and generates a demand recession. This reduces...

We provide a continuous-time “risk-centric” representation of the New Keynesian model, which we use to analyze the interactions between asset prices, financial speculation, and macro- economic outcomes when output is determined by aggregate demand. In principle, interest rate policy is...

The basic premise of this paper is that understanding aggregate dynamics requires considering that agents are heterogeneous and that they do not adjust continuously to the shocks they perceive. We provide a general characterization of lumpy behavior at the microeconomic level in terms of an...

In this paper we provide a framework to study the aggregate dynamic behavior of an economy where individual units follow (S,s) policies. We characterize structural and stochastic heterogeneities that ensure convergence of the economy's aggregate to that of its frictionless counterpart, determine...

When firms face menu costs, the relation between their output and money is highly nonlinear. At the aggregate level, however, this needs not be so. In this paper we study the dynamic behavior of a general equilibrium menu-cost economy where firms are heterogeneous in the shocks they perceive,...

This paper investigates the response of industries to cyclical variations in demand in the context of a vintage model of ?creative destruction.? Due to process and product innovation, production units that embody the newest techniques are continuously being created, and outdated units are being...

In this paper we characterize the average response of output to aggregate demand shocks in an economy where individual firms follow state-dependent pricing rules. We find that: (i) the average response of output to aggregate demand shocks decreases with core inflation and varies...