Governments often contract with private firms to provide public services such as health care and education. To decrease firms' incentives to selectively enroll low-cost individuals, governments frequently "risk-adjust" payments to firms based on enrollees' characteristics. We model how risk...

Governments often contract with private firms to provide public services such as health care and education. To decrease firms' incentives to selectively enroll low-cost individuals, governments frequently "risk-adjust" payments to firms based on enrollees' characteristics. We model how risk...

We develop a dynamic network formation model that can explain the observed nestedness in real-world networks. Links are formed on the basis of agents’ centrality and have an exponentially distributed life time. We use stochastic stability to identify the networks to which the network formation...

In this paper I analyze the formation of networks in which each agent is assumed to possess some information of value to the other agents in the network. Agents derive payoff from having access to the information of others through communication or spillovers through the links between them....

That Congress is corrupt is no secret. Polls show that it is held in very low esteem by the public. Why is that? The effectiveness of voter control of public policy in a system of representative government depends on compatibility of representative incentives with voter preferences. Many...

Edwards and Ogilvie dispute the empirical basis of the view that a multilateral reputation mechanism mitigated agency problems among the eleventh-century Maghribi traders. They allege that the relations among merchants and agents were founded in law. This paper refutes this assertion using...

Only when we understand why open access is necessary can we design an implementation that is responsive to the particular form of market failure that gives rise to the need for regulatory intervention. Otherwise, we are “shooting in the dark.” There are at least two equal access issues:...