Economic dislocations and the increased availability of nonnuclear kin may have encouraged the formation of extended family households in the early industrialization of the United States.
The psychological well-being of parents is, on average, a little worse than that of childless couples, and it remains lower until children grow up and move out of the household.
The model of the family that includes a married couple, breadwinner husband and homemaker wife, and children now describes only one in five families in the United States.