The ease of transportation, the opening of international immigration policies, the growing refugee movements, and the increasing size of unauthorized immigrant populations suggest that immigration worldwide is a phenomenon of utmost importance to professionals who develop policies and programs for, or provide services to, immigrants. Immigration occurs in both the wealthy nations of the global North and the poorer countries of the global South; it involves individuals who arrive with substantial human capital and those with little. It has far-reaching implications for a nation's economy,...