Columbia subject headings:
Harvard subject headings:
Asylum, Right of--European Union countries
European Union countries--Emigration and immigration
European Union countries--Emigration and immigration--Government policy
European Union--Membership.
Immigrants--Government policy--European Union countries.
Labor market--European Union countries
Migrant labor--European Union countries.
Princeton subject headings:
European Union countries--Emigration and immigration--Government policy.
European Union countries--Emigration and immigration.