Capital reallocation is procyclical in the data, but countercyclical in standard business-cycle models. To solve this puzzle, I build a model of endogenous partial irreversibility, with heterogeneous firms facing aggregate and idiosyncratic productivity shocks. Used investment goods are...

We propose a theory of optimal fiscal policy consistent with the observation that governments typically inherit their predecessors' plans and formulate their policies over a finite future horizon. We use this framework, which we call “Limited-Time Commitment" (LTC), to make two contributions....

This paper studies the equilibrium dynamics in consumer durable goods markets after aggregate credit shocks. We introduce two novel features into a general-equilibrium model of durable consumption with heterogeneous households facing idiosyncratic income risk and borrowing constraints: (1)...

We study optimal policy when the planner has partial information in a general setup where observed signals are endogenous to policy. In this context, signal extraction and policy have to be determined jointly. We derive a general non-standard first order condition of optimality from first...