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cultural anthropology Origin South and Central America social psychology Americas Latin America economics population social policy demography Migrants developing country Population Dynamics Developing Countries Political Factors Social Problems Ethnic Groups ethnic group policy human rights Settlement And Resettlement Cultural Background North America Manpower Needs health care manpower Health Manpower social problem Socioeconomic Factors Migration Policy--changes socioeconomics Western Hemisphere Article migration Prejudice international migration population and population related phenomena Demographic Factors politics Emigration and Immigration Economic Factors Transients and Migrants Population Characteristics social discrimination Human Resources public policy Historical Survey Population Policy Culture English Abstract