"The authors investigate the impact of international migration on child health outcomes in rural Mexico using a nationally representative demographic survey. They use historic migration networks as instruments for current household migration to the United States in order to correct for the possible endogeneity of migrant status. They find that children in migrant households have lower rates of infant mortality and higher birth-weights. The authors study the channels through which migration may affect health outcomes and find evidence that migration raises health knowledge in addition to the direct effect on wealth. However they also find that preventative health care, such as breastfeeding and vaccinations, is less likely for children in migrant households. These results provide a broader and more nuanced view of the health consequences of migration than is offered by the existing literature. "--World Bank web site.