Columbia subject headings:
Harvard subject headings:
Demographic transition--Economic aspects.
Europe--Emigration and immigration--Economic aspects.
Europe--Emigration and immigration--Government policy.
Foreign workers--Government policy--Europe.
Foreign workers--Government policy--North America.
North America--Emigration and immigration--Economic aspects.
North America--Emigration and immigration--Government policy.
Skilled labor--Supply and demand.
Transatlantic Council on Migration.
Princeton subject headings:
Demographic transition--Economic aspects.
Europe--Emigration and immigration--Economic aspects.
Europe--Emigration and immigration--Government policy.
Foreign workers--Government policy--Europe.
Foreign workers--Government policy--North America.
North America--Emigration and immigration--Economic aspects.
North America--Emigration and immigration--Government policy.
Skilled labor--Supply and demand.
Transatlantic Council on Migration.