Throughout human history, livestock producers have relied on a vibrant international exchange of genentic resources to achieve improvements in the quality and productivity of their animals. In recent years, however, some observers have argued that changes in the legal, technological, and...

Many widely used economic models implicitly assume that income shares should be identical across time and space. Although time-series data from industrial countries appear consistent with this notion, cross-section data generally appear to contradict the assumption. A commonly used calculation...

Both policy makers and researchers have devoted considerable attention in recent years to the large current account and capital account imbalances among OECD countries. In particular, the size of the United States current account deficit has attracted intense attention and spawned numerous...

Malaria is a parasitic disease that causes over 300 million "acute illness" episodes and one million deaths annually. Most occur in the tropics, especially sub-Saharan Africa. Countries with high rates of malaria prevalence are gen- erally poor, and some researchers have suggested a direct link...

Many widely used economic models implicitly assume that income shares should be identical across time and space. Although time series data from industrial countries appear consistent with this notion, cross-section data generally appear to contradict the assumption of constant income shares. A...

We study the impact of global climate change on the prevalence of tropical diseases using a heterogeous agent dynamic general equilibrium model. In our framework, households can take actions (e.g., purchasing bednets or other goods) that provide partial protection from disease. However, these...

In most poor countries, small firms and self-employment are the dominant forms of business enterprise--even in the manufacturing sector. For rich countries, in contrast, self-employed people account for very small shares of manufacturing employment and output. This paper builds on Lucas [1978....

Using data on the distributions of disease and pest resistance among wheat varieties, this paper reports theoretical and empirical findings concerning the efficient management of a gene bank and the optimal size of a collection.