Spatial Mobility,Family Dynamics,and Housing Transitions

This paper summarizes theoretical approaches and empirical research on the links between partnership and family dynamics on the one hand and spatial mobility and housing transitions on the other. Spatial mobility includes residential relocations and commuting. We consider three types of partnerships—living apart together, unmarried and married co-residential unions—and the transitions between them. We also consider separations and the death of a partner. Moreover, we pay attention to childbirth and its consequences for relocation decisions and housing. We differentiate spatial mobility according to distance and direction; housing transitions are considered mainly with respect to changes in ownership status and housing quality (e.g. size of the accommodation). In line with the adjustment perspective on spatial mobility, this paper demonstrates that spatial mobility is a means for individuals and households to adjust their housing situation and their place of residence to requirements of a changing household size and composition as well as to demands of the labor market. At the same time, spatial mobility seems to be more than a mere adjustment process of individuals or households: it is also a determinant of life course changes.     

Estimation of Semiparametric Models when the Criterion Function Is Not Smooth

We provide easy to verify sufficient conditions for the consistency and asymptotic normality of a class of semiparametric optimization estimators where the criterion function does not obey standard smoothness conditions and simultaneously depends on some nonparametric estimators that can themselves depend on the parameters to be estimated. Our results extend existing theories such as those of Pakes and Pollard (1989), Andrews (1994a), and Newey (1994). We also show that bootstrap provides asymptotically correct confidence regions for the finite dimensional parameters. We apply our results to two examples: a ‘hit rate’ and a partially linear median regression with some endogenous regressors.