Agriculture's share of economic activity is known to vary inversely with a country's level of development. This paper examines whether extensions of the neoclassical growth model can account for some important sectoral patterns observed in a current cross-section of countries and in the time...

This paper examines the effect of agricultural development on a country's overall development and growth experience. In most poor countries, large fractions of land, labor, and other productive resources are devoted to producing food for subsistence needs. This "food problem" can delay a...

Across countries, women and men allocate time differently between market work, domestic services, and care work. In this paper, we document the gender division of work, drawing on a new harmonized data set that provides us with high-quality time use data for 50 countries spanning the global...

A theoretical model is developed and applied to the search for disease and pest resistance in ex situ collections of wheat genetic resources, employing actual data on frequency distributions, disease losses, and search costs. Experiments developed from case studies clarify several misperceptions...

In most poor countries, large majorities of the population live in rural areas and earn their livelihoods primarily from agriculture. Many rural people in the developing world are poor, and conversely, most of the world's poor people inhabit rural areas. Agriculture also accounts for a...

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...