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Sommerfeld, Katrin
Fitzenberger, Bernd
Steffes, Susanne
Year of Publication: 
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Beiträge zur Jahrestagung des Vereins für Socialpolitik 2010: Ökonomie der Familie - Session: Human Capital and Family Economics C6-V2
The effects of employment breaks on labor market outcomes are of great relevance in particular for females in relation with childbirth. In this paper we estimate the effect of the timing of women's first birth on later labor market outcomes, more precisely the effect on employment. In order to investigate the treatment effect of having the first childbirth now or waiting, we employ the dynamic treatment approach in the spirit of Sianesi (2004, 2008). We combine this approach with the inverse probability weighting (IPW) as in Busso et al. (2009) for better performance than matching with respect to bias and variance in finite samples with good overlap. Finally, we assess effect heterogeneity by estimating ex post outcome regressions as in Abadie, Imbens (2006). We implement this novel approach on a monthly basis by using the German SOEP data set from 1991 to 2008. Preliminary results show that there are very strong employment effects around childbirth which decline over time, but remain significantly negative for all age groups over the whole considered period of five years after childbirth. Further, the treatment effect patterns display substantial dynamics and heterogeneity for the different age groups. Considering educational heterogeneity shows that the employment drop is less pronounced for university graduates above the age of 30.
Female labor supply
Maternity leave
Dynamic treatment effect
Inverse Probability Weighting
Document Type: 
Conference Paper

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