Observed Migration Effectiveness (IMAGE) Dartmouth College Caption This image shows the observed migration effectiveness: Hostile states. Source: Public Use Microsamples from 2000 U.S. decennial census, and the 2005–2010 annual American Community Survey (Ruggles et al. 2015). Restricted to flows between the lower forty-eight states and persons between eighteen and sixty-five. Calculations by author (Color figure available online). Credit Figure from AAAG article. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.