Why do mothers favor girls and fathers, boys? : A hypothesis and a test of investment disparity.

摘要: Growing evidence suggests mothers invest more in girls than boys and fathers girls. We develop a hypothesis that predicts preference for by the parent facing resource constraints less constraint. test with panel data from Tsimane', foraging-farming society Bolivian Amazon. Tsimane' face fathers. As predicted, mother's wealth protected girl's BMI, but father's had weak effects on boy's BMI. Numerous tests yielded robust results, including those controlled fixed of child household.