Emigration and immigration Government policy Immigrants 33 History 20 Citizenship 13 Refugees 11 Social aspects 11 Cultural assimilation 9 Economic aspects 9 Political aspects 9 Social conditions 9 Emigration and immigration law 8 Politics and government 7 Ethnic relations 6 Public opinion 6 Alien labor 5 Aliens 5 Jews 4 Multiculturalism 4 Race relations 4 Asylum, Right of 3 International cooperation 3 Migration, Internal 3 Racism 3 Refugees, Jewish 3 Welfare state 3 Asians 2 Border security 2 Boundaries 2 Civil rights 2