Columbia subject headings:
Harvard subject headings:
Canada--Social conditions--1945-
Globalization--North America.
Mexico--Social conditions--1970-
North America--Social policy.
United States--Social conditions--1945-
Welfare state--North America.
Princeton subject headings:
Canada--Social conditions--1945-
Mexico--Social conditions--1970-
United States--Social conditions--1945-
Welfare state--North America.