Columbia subject headings:
Discretionary income--United States--Statistics.
Income distribution--United States--Statistics.
United States--Economic conditions--1981-2001--Statistics.
Harvard subject headings:
Discretionary income--United States--Statistics.
Income distribution--United States--Statistics.
Income--United States--Statistics
United States--Economic conditions--1981-2001--Statistics.
Princeton subject headings:
Discretionary income--United States--Statistics.
Income distribution--United States--Statistics.
Statistics.
United States--Economic conditions--1981---Statistics.