Columbia subject headings:
Competition, Unfair--Congresses.
Oligopolies--Congresses.
Welfare economics--Congresses.
Harvard subject headings:
Competition, Unfair--Congresses.
Oligopolies--Congresses.
Welfare economics--Congresses.
Princeton subject headings:
Competition, Unfair--Congresses.
Oligopolies--Congresses.
Welfare economics--Congresses.