At least a dozen local, regional, and global analyses published in the last five years provide credible evidence that refugees and migrants offer long-term economic benefits for their new communities. J. Edward Taylor, a professor of agricultural and resource economics at the University of California, Davis, and director of the Rural Economies of the Americas and Pacific Rim Program, led two such studies, from Rwanda and Uganda, finding that every dollar spent by governments and organizations on refugee aid is multiplied as added income.