Columbia subject headings:
Wages--Women--United States.
Women--Employment--United States.
Women--Pensions--United States.
Harvard subject headings:
Human capital--United States--Mathematical models.
Labor supply--United States--Mathematical models.
Married women--Employment--United States--Mathematical models.
Princeton subject headings:
Human capital--United States--Mathematical models.
Labor supply--United States--Mathematical models.
Married women--Employment--United States--Mathematical models.