Princeton University.
Popul Stud (Camb). 2022 Mar;76(1):1-18. doi: 10.1080/00324728.2022.2027003. Epub 2022 Feb 8.
Parents with two boys or two girls are more likely to have a third child than those with a 'sex mix'. However, little is known on whether these 'mixed-sex preferences' extend beyond the nuclear family. This study leverages the random variation in sex at birth to assess whether the sex of nieces and nephews, in combination with own children, matters for fertility choices. Using three-generational data from the US Panel Study of Income Dynamics (PSID), I show that extended families (including grandparents, their children, and their grandchildren) are collectively more likely to have three or more grandchildren when lacking sex mix, whether the first two grandchildren are siblings or cousins. I explore the pathways for these offspring sex preferences, finding support for a preference for an uninterrupted line of male descendants. This multigenerational approach also contributes a new estimation strategy that causally estimates the effects of family sizes on outcomes beyond fertility.
有两个男孩或两个女孩的父母比有“性别混合”的父母更有可能生育第三个孩子。然而，对于这些“混合性别偏好”是否超出核心家庭，人们知之甚少。本研究利用出生时性别的随机变化来评估侄子和侄女的性别，以及与自己孩子的结合，是否对生育选择有影响。利用来自美国收入动态小组研究（PSID）的三代人数据，我表明，当缺乏性别混合时，包括祖父母、他们的孩子和他们的孙子孙女在内的大家庭更有可能有三个或更多的孙子孙女，而不管前两个孙子孙女是兄弟姐妹还是表亲。我探讨了这些后代性别偏好的途径，发现支持连续的男性后代偏好。这种多代方法还提供了一种新的估计策略，该策略可以从因果关系上估计家庭规模对生育以外的结果的影响。
