This paper presents identification and estimation results for a flexible state space model. Our modification of the canonical model allows the permanent component to follow a unit root process and the transitory component to follow a semiparametric model of a higher‐order...

[...]Our analysis is composed of three parts. First, we provide adiscussion of what the effects of welfare reform on thecomposition of the caseload—primarily measured by labormarket skill level—should be, in principle. Perhaps surprisingly,we argue that different welfare reform policies...