Emigration and immigration Government policy 88 History 81 Social aspects 74 Immigrants 60 Economic aspects 49 Foreign workers 43 Political Science 32 Public health 32 Migration 31 Social conditions 28 Human Migration 21 Immigration & Emigration 21 Refugees 21 Émigration et immigration 21 Emigración e inmigración 19 Law, Politics & Government 19 Sociology 17 Migration Policy 16 Political aspects 16 Social service 14 Sociology of Migration 13 Economic conditions 12 Migration, Internal 12 Politics and government 12 Ethnic relations 11 Europe 11 Religious aspects 11 migration 11 Labor mobility 10