Are the English proficiency and social outcomes of US immigrants the result of their cultural preferences or of more fundamental constraints? Using 2000 census microdata, we relate the English proficiency, marriage, fertility, and residential location variables of immigrants to their age at the...

This study uses the malaria-eradication campaigns in the United States (circa 1920) and in Brazil, Colombia, and Mexico (circa 1955) to measure how much childhood exposure to malaria depresses labor productivity. The campaigns began because of advances in health technology, which mitigates...