We investigate the causes of civil war, using a new data set of wars during 1960-99. We test a `greed’ theory focusing on the ability to finance rebellion, against a`grievance’ theory focusing on ethnic and religious divisions, political repression and inequality. We find that greed...

This paper examines the measurement, size and implications of the Underground Economy in the US.

This paper examines the size and implications of the Underground Economy in the US.

A taxonomy of underground economies is elaborated based on the new institutional approach to economic development. Members of formal sectors confront different sets of transformation and transaction costs than do members of informal sectors and these differences are regarded as crucial to the...

For groups that must make several decisions of similar form, we define a simple and general mechanism that is designed to promote social efficiency. The mechanism links the various decisions by forcing agents to budget their representations of preferences so that the frequency of preferences...

This paper develops a positive analysis of stable group formation, highlighting the role of conflict management within groups. The analysis is based on a model of sequential conflict, starting with a "winner- take-all" contest for control of some resource. When a group forms, members pool their...

This paper develops a positive analysis of alliance formation that builds on a simple economic model featuring a “winner-take-all” contest for control of some resource. When an alliance forms, members pool their efforts in that contest and,if successful, apply the resource to a joint...

This paper studies dynamic, endogenous institutional change. We introduce the class of dynamic political games (DPGs), dynamic games in which future political aggregation rules are decided under current ones, and the resulting institutional choices do not affect payoffs or technology directly. A...

This paper examines existence of Markov equilibria in the class of dynamic political games (DPGs). DPGs are dynamic games in which political institutions are endogenously determined each period. The process of change is both recursive and instrumental: the rules for political aggregation at date...