In this article, we study U.S. unemployment dynamics using grouped unemploy
ment data from the Current Population Survey over the period 1968-1992. We
estimate a model that traces variation in these unemployment data, both ove
r time and between demographic groups, back to the underlying variation in
the inflow and the outflow. In turn, we model the outflow as a transition p
rocess in which we allow the exit probabilities to depend on calendar time,
duration, and demographic group. We use the estimation results to provide
a decomposition of aggregate U.S. unemployment dynamics in various incidenc
e and duration components.