The duration of large-scale violent civil conflict increases substantially if the society is composed of a few large ethnic groups, if there is extensive forest cover, and if the conflict has commenced since 1980. None of these factors affect the initiation of conflict. And neither the duration...

May 2000 - Of the 27 major armed conflicts that occurred in 1999, all but two took place within national boundaries. As an impediment to development, internal rebellion especially hurts the world's poorest countries. What motivates civil wars? Greed or grievance? Collier and Hoeffler compare two...

The accumulation of decent housing matters both because of the difference it makes to living standards and because of its centrality to economic development. The consequences for living standards are far-reaching. In addition to directly conferring utility, decent housing improves health and...

The connections between transport infrastructure and economic development have been extensively analyzed in previous research, but little is known about the cost of infrastructure investments in poor countries. This paper examines drivers of unit costs of construction and maintenance of...

July 2000 - Poverty in the developing world will decline by roughly half by 2015 if current growth trends and policies persist. But a disproportionate share of poverty reduction will occur in East and South Asia, poverty will decline only slightly in Sub-Saharan Africa, and it will increase in...

In the efficient allocation of aid, aid is targeted disproportionately to countries with severe poverty and adequate policies. For a given level of poverty, aid tapers in with policy reform. In the actual allocation of aid, aid tapers out with reform. - Aid now lifts about 30 million people a...