Chapitre d'ouvrage: We review some of the recent estimates of the effect of weather and climate on migration, and articles examining the historical evidence of such links. We identify four issues that have received less attention in previous reviews on the topic. The first one is general equilibrium effects of climate change and migration. The second one concerns accounting for thresholds in the climate-migration relationship. Some of the articles that we review incorporate non-linear effects, but only in the relation between income and migration, and in the relation between weather, climate and migration. Other thresholds are not yet incorporated into the literature. A third issue where much work remains to be done relates to climate change and conflict, and their influence on migration. Finally, we conclude with some reflections on the implications of the results for economic development.