Skip to main content
. 2017 Mar 13;114(13):E2590–E2607. doi: 10.1073/pnas.1618655114

Fig. 4.

Fig. 4.

(A) The effect of one’s brothers marrying relatives on total fertility. Males have significantly fewer children when their brothers marry relatives and females have slightly more children when their brothers marry relatives. y axis: residuals (Methods) for total number of children. x axis: mean relatedness of one’s brothers (maternal and paternal) to their spouses. Error bars: 95% CI. (B) The effect of one’s sisters marrying relatives on total fertility. Males have more children when their sisters marry relatives and females are largely unaffected by whom their sisters marry. y axis: residuals (Methods) for total number of children. x axis: mean relatedness of one’s sisters (maternal and paternal) to their spouses. Error bars: 95% CI.