On the basis of a longitudinal administrative dataset (1991-2002) merged with the Census of 2001 and the National Register, the majority of the poor elderly in Belgium appear to be persistently poor. The question arises why this might be so. To the extent that individual characteristics such as...

We study the non-parametric identification of a mixed proportional hazard model with lagged duration dependence when data provide multiple outcomes per individual or stratum. We show that the information conveyed by the within strata variation can be exploited to non-parametrically identify...