As many as one million deaths annually are attributed to malaria, a parasitic disease transmitted by mosquitoes. The heaviest burdens of malaria are found in poor tropical countries, where medical systems are often ill-equipped to treat the sick, and where public health programs may lack the...

Many theories link urbanization with industrialization; in partic- ular, with the production of tradable (and typically manufactured) goods. We document that the expected relationship between urbanization and the levelofindustrializationisnotpresentinasampleofdevelopingeconomies. The breakdown...

The Lewis model has remained, for more than half a century, one of the dominant theories of development economics. This paper argues that the power of the model lies in the simplicity of its central insight: that poor countries contain enclaves of economic activity just as rich countries contain...

A defining feature of many poor economies is the large fraction of workers engaged in subsistence agriculture. We develop a multi-sector multi-region model of a poor economy in which it is costly to transport goods across regions in order to study this outcome. A key finding is that higher...

A large fraction of Uganda's population continues to earn a living from quasi-subsistence agriculture. This paper uses a static general equilibrium model to explore the relationships between high transportation costs, low productivity, and the size of the quasi-subsistence sector. We...