All we want is a healthy baby….

… and one that is the opposite sex to what we have already. We all know families with three boys or three girls. Did they go on to have three children in the hope that the third child would be the opposite sex to the first two? Are they disappointed when they have another child of the same sex? In this paper, using two British cohort studies, we construct a sample of parents that only differ in the sex of the third born child when the first two are the same sex. Conditional on pregnancy, the sex of a child is random so it is an exogenous influence on the SWB of the parents. We show that, contrary to previous studies, having three children of the same sex negatively affects life satisfaction. You can read the full paper here.