Daughters and divorce – Parents of daughters are more likely to divorce than those with sons | Science & technology – The Economist

DAUGHTERS HAVE long been linked with divorce. Several studies conducted in America since the 1980s provide strong evidence that a couples first-born being a girl increases the likelihood of their subsequently splitting up. At the time, the researchers involved speculated that this was an expression of son preference, a phenomenon which, in its most extreme form, manifests itself as the selective abortion or infanticide of female offspring.
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