The causal effects of fertility are a central focus in the social sciences, but the analysis is challenged by the endogeneity of fertility choices. Earlier work has proposed several “natural experiments” from twin births or gender composition of earlier births to assess whether having more...

The causal effects of fertility are a central focus in the social sciences, but the analysis is challenged by the endogeneity of fertility choices. Earlier work has proposed several "natural experiments" from twin births or gender composition of earlier births to assess whether having more...

Sibling correlations in socioeconomic status are one of the key measures of equality of opportunity and social mobility, providing an omnibus examination of the importance of family background. Typically, these correlations are interpreted as the combined effects of shared sibling background and...

We examine whether genome-wide summary measures of genetic risk known as polygenic indices (PGIs) provide new insights into the efficacy of the Lung Health Study (LHS)-a large, randomized controlled trial (RCT) that evaluated the effect of a smoking cessation intervention program on cessation...

Sibling correlations in socioeconomic status are one of the key measures of equality of opportunity and social mobility, providing an omnibus examination of the importance of family background. Typically, these correlations are interpreted as the combined effects of shared sibling background and...

Prior studies have established that higher educational attainment is associated with a longer telomere length (TL), a marker of cellular aging. However, it is unclear whether extant associations are causal, since they are likely confounded by unobserved genetic, early-life and family background...