We study a dynamic contracting problem in which size is relevant. The agent may take on excessive risk to enhance short-term gains, which exposes the principal to large, infrequent losses. To preserve incentive compatibility, the optimal contract uses size as an instrument; there is downsizing...

We use a model with agency frictions to analyze the structure of a dealer market that faces competition from a crossing network. Traders are privately informed about their types (e.g. their portfolios), which is something the dealer must take into account when engaging his counterparties....

A principal delegates the running of a project to an agent subject to moral hazard over an infinite horizon, and cannot observe any of the outcomes. The agent sends reports at each instant t; naturally reports may be manipulated. Eliciting truthful revelation is necessary to the provision of...

Principals seek to trade with agents by posting incentive contracts in a search environment. A contract solves the ex ante search problem, and adverse selection and moral hazard ex post. We fully characterise the equilibrium for quasi linear preferences, and derive some comparative statics. If...