The conflict in Northern Ireland was an example of "complex warfare" with both insurgency and sectarian violence. We present a unified model that helps to identify these two forms of conflict from the spatial distribution of violence. The model predicts that tectonic boundaries between...

The goal of this report is to present the results from a unified conceptual framework so as to evaluate the cost-effectiveness and different trade-offs involved in conflict prevention. The context for the framework's development is a radical rethinking of the peacebuilding architecture put forth...

This paper studies long-term impacts of violent conflict, to provide insights into the costs of conflict and policies to prevent conflict relapse. The findings link evidence on the contemporaneous effects of conflict with its persistent impact, especially by combining multiple data sources such...

The purpose of this paper is to derive a Rao's efficient score statistic for testing for heteroscedasticity in an error components model with only individual effects. We assume that the individual effect exists and therefore do not test for it. In addition, we assume that the individual effects,...

This paper analyzes the important time variation in U.S. aggregate portfolio allocations. To do so, we first use flexible descriptions of preferences and investment opportunities to derive optimal decision rules that nest tactical, myopic, and strategic portfolio allocations. We then compare...