Consistent with inclusive fitness theory, evolutionary biologists predict that individuals care more for their biological than their social children and hence that biological children assess the relationships to their parents better than stepchildren. To test this assumption, we use data from...

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The longterm historical decline in infant mortality has been accompanied by increasing concentration of infant deaths at the earliest stages of infancy. The influence of prenatal and neonatal conditions has become increasingly dominant relative to postnatal conditions as external causes of death...

Consistent with inclusive fitness theory, evolutionary biologists predict that individuals care more for their biological than their social children and hence that biological children assess the relationships to their parents better than stepchildren. To test this assumption, we use data from...

Parental death precipitates a cascade of events leading to more or less detrimental exposures, from the sudden and dramatic interruption of parental care through the cohabitation with step parents and siblings in a recomposed family. This paper compares the effect of early parental loss on the...

Advanced maternal age is associated with negative offspring health outcomes. The interpretation often relies on physiological processes related to aging, such as decreasing oocyte quality. We use a large population-based sample of American adults to analyze how selection and lifespan overlap...

This paper examines the relationship between home-leaving intensities of young adults and the rapid social, economic, and demographic changes that took place in post-World War II Japan. By using event-history modeling, the study shows that the declines in sibling numbers and in rural residence...

This document describes the standardization process of the Harmonized Histories. The Harmonized Histories is a comparative database of rich reproductive and union histories from surveys conducted in a number of countries in Europe. Given that birth and union data has been collected in a number...

This paper validates the fertility and union histories of the German Generations and Gender Survey (GGS). One major result from this validation is that the fertility of the older GGS-cohorts is too low, while it is too high for the younger cohorts. For partnership histories, we find a similar...