Columbia subject headings:
Budget--United States.
Free trade--Canada.
Free trade--Mexico.
Free trade--North America.
Free trade--United States.
United States--Commercial policy.
United States--Commercial treaties.
United States--Economic conditions--1981-2001.
Harvard subject headings:
Budget--United States
Free trade--North America
United States--Commercial policy.
United States--Economic conditions--1981-2001.
Princeton subject headings:
Budget--United States.
Free trade--North America.
North American Free Trade Agreement
United States--Commercial policy--1993-.
United States--Economic conditions--1981-2001.