Columbia subject headings:
Medical care--Contracting out--United States.
Public welfare--Contracting out--United States.
Social service--Contracting out--United States.
Harvard subject headings:
Medical care--Contracting out--United States
Public welfare--Contracting out--United States.
Social service--Contracting out--United States.
Princeton subject headings:
Medical care--Contracting out--United States.
Public welfare--United States--Contracting out.
Social service--United States--Contracting out.