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The effect of a sibling’s gender on earnings and family formation

Noemi Peter, Petter Lundborg (), Sara Mikkelsen and Dinand Webbink

Labour Economics, 2018, vol. 54, issue C, 61-78

Abstract: We examine how the gender of a sibling affects labor market outcomes and family formation. Identification is complicated by parental preferences: if parents prefer certain sex compositions over others, children’ s gender affects not only the outcomes of other children but also the existence of potential additional children. We employ two empirical strategies that both address this problem. First, we use a large sample of singletons to estimate whether first-borns are affected by the gender of their second-born sibling. Second, we look at a sample of dizygotic (i.e. non-identical) twins. We find that a same-sex sibling increases men’s earnings and family formation outcomes (marriage and fertility), as compared to an opposite-sex sibling. The results for women are similar but the effects are smaller in magnitude and less robust. We argue that the income result for men could be driven by competition between brothers, as we find that men with brothers choose higher paying occupations. For women, we find suggestive evidence that the income premium may come partly from lower unemployment, which could be due to shared job search networks. The effects on family formation might stem from differential parental treatment for men, and from competition between sisters for women.

Keywords: Sibling gender; Sex composition; Twins; Income; Fertility (search for similar items in EconPapers)
JEL-codes: J00 J16 J24 J13 (search for similar items in EconPapers)
Date: 2018
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