Effective October 1990, the Family Support Act (FSA) of 1988 extended
the previously state-optional AFDC-Unemployed Parent (UP) program to a
ll states. This policy was undertaken in an effort to reduce the two-p
arent penalty of the AFDC program, but little is actually known about
UP and its influence on family structure. This study clarifies what is
meant by ''two-parent family'' in the federal legislation and provide
s new evidence on AFDC's incentive effects. The empirical analysis mak
es use of the cross-state variation in the generosity of AFDC benefits
and the presence (or absence) of AFDC-UP before the FSA of 1988. Spec
ifically, these state-level data are appended to data from the 1987 Na
tional Survey of Families and Households (NSFH). A real advantage of t
he NSFH is that it allows for the identification of those truly eligib
le for the UP program-married and unmarried couples who have an ''in-c
ommon'' dependent child. The major empirical finding is that contrary
to the hopes of Congress, a state's provision of a UP program is not f
ound to encourage two-parent families.