A principal must decide whether or not to implement a project which originated with one of her employees. The employees have private information about the quality of the project. A successfully implemented project raises the inventor's chance of promotion, at his peer's expense, but a failed...

We examine the incentives of regions in a country to unite or to separate. We find that smaller regions have greater incentives to unite, relative to larger regions. We show, however, that on the whole, majority voting on separation and union generates excessive incentives to separate. This...

In many economic and social contexts, individuals can undertake a transaction only if they are `linked' or related to each other. We take the view that these links are costly, in the sense that it takes effort and resources to create and maintain them. The link formation decisions of the players...