Migration Quantifying Global International Migration Flows http://www.global-migration.info http://www.global-migration.info/VID_Global_Migration_Datasheet_web.pdf Mapping Migration in the United States Where We Came From and Where We Went, State by State Science of science Quantifying the diaspora of knowledge in the last century Migration and innovation The Contribution of High-Skilled Immigrants to Innovation in the United States Fascinating paper by Rebecca Diamond and co-authors finds that immigrants account for up to 30% of innovation and United States, as measured by patents. Far disproportionate to their numbers in the population.