New Estimates on the Effect of Parental Separation on Child Health

This study examines the causal link between parental non-marital relationship dissolution and the health status of young children. Using a representative sample of children all born out of wedlock drawn from the Fragile Families and Child Wellbeing Study, we investigate whether separation between unmarried biological parents has a causal effect on a child’s likelihood of developing asthma. Adopting a potential outcome framework to account for selection of relationship dissolution, we find that children whose parents separate within three years after childbirth are seven percent more likely to develop asthma by age three, compared to if their parents had remained romantically involved. We provide evidence that socioeconomically disadvantaged fathers are more likely to see the relationship with their child’s mother end, and selection into relationship dissolution along these dimensions helps explain the poorer health outcomes found among out-of-wedlock children whose parents separate.