In the final article this quarter, Aubhik Khan wonders: What determines whether a manufacturing plant survives? Is it access to credit markets? Or does learning about plants' profitability over time determine survival? Should government policy play a role in helping plants survive? In...

We solve equilibrium models of lumpy investment wherein establishments face persistent shocks to common and plant-specific productivity. Nonconvex adjustment costs lead plants to pursue generalized (S, s) rules with respect to capital; thus, their investments are lumpy. In partial equilibrium,...

We examine the impact of incomplete risk-sharing on growth and welfare. The source of market incompleteness in our economy is private information: a household's idiosyncratic productivity shock is not observable by others. Risk-sharing between households occurs through long-term contracts with...

Aubhik Khan explains some of the things economists have learned about how investment changes over the business cycle

Recent empirical analysis has found nonlinearities to be important in understanding aggregated investment. Using an equilibrium business cycle model, we search for aggregate nonlinearities arising from the introduction of nonconvex capital adjustment costs. We find that, while such costs lead to...

The authors develop an equilibrium business cycle model in which final goods producers pursue generalized (S,s) inventory policies with respect to intermediate goods, a consequence of nonconvex factor adjustment costs. Calibrating their model to reproduce the average inventory-to-sales ratio in...

Using an equilibrium business cycle model, the authors search for aggregate nonlinearities arising from the introduction of nonconvex capital adjustment costs. The authors find that while such adjustment costs lead to nontrivial nonlinearities in aggregate investment demand, equilibrium...

The authors develop a model of costly technology adoption where the cost is irrecoverable and fixed. Households must decide when to switch from an existing technology to a new, more productive technology. Using a recursive approach, the authors show that there is a unique threshold level of...

The author examines the impact of incomplete risk-sharing on growth and welfare. The source of market incompleteness in the economy is private information: a household's idiosyncratic productivity shock is not observable by others. Risk-sharing between households occurs through long-term...