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

This paper considers the effect of offer matching on labor market outcomes when the current employer has better information about his worker's productivity than potential employers. Previous research found that when current employers have better information than potential employers, the later...

We study the effect of physician incentives in an HMO network. Physician incentives are controversial because they may induce doctors to make treatment decisions that differ from those they would chose in the absence of incentives. We set out a theoretical framework for assessing the degree to...

Macroeconomic models with heterogeneous agents and incomplete markets (e.g. Krusell and Smith, 1998) usually assume that consumers, rather than firms, own and accumulate physical capital. This assumption, while convenient, is without loss of generality only if the asset market is complete. When...