The marginal cost of effort often increases as effort is exerted. In a dynamic moral hazard setting, dynamically increasing costs create information asymmetry. This paper characterizes the optimal contract and helps explain the popular yet thus far puzzling use of non-linear incentives, for...

We study the welfare maximizing assignment of several heterogeneous, commonly ranked objects to impatient agents with privately known characteristics who arrive sequentially according to a Poisson or renewal process. There is a deadline after which no more objects can be allocated. We first show...

This paper studies optimal contracts and monitoring policies in procurement under dynamic adverse selection and moral hazard concerning a cost-reducing investment decision. I assume fixed costs of investment and show that the resulting 'lumpy' investment behavior creates a motive to monitor...