Columbia subject headings:
Hospitalization insurance--United States--Mathematical models.
Hospitals--Economic aspects--United States--Mathematical models.
Hospitals--Economic aspects--United States.
Hospitals--United States--Cost of operation--Mathematical models.
Harvard subject headings:
Hospitalization insurance--United States--Mathematical models.
Hospitals--Economic aspects--United States
Hospitals--Economic aspects--United States--Mathematical models.
Hospitals--United States--Cost of operation--Mathematical models.
Princeton subject headings:
Hospitalization insurance--United States--Mathematical models.
Hospitals--Economic aspects--United States--Mathematical models.
Hospitals--Economic aspects--United States.
Hospitals--United States--Cost of operation--Mathematical models.