Boys will be boys: are there gender differences in the effect of sexual abstinence on schooling?
利用身体发育指数作为工具变量，发现性禁欲显著提高女性高中毕业概率，但对男性学业影响很小，与男性较少因早期性行为遭受心理负面后果的已有证据一致。
A recent study by Sabia and Rees (2009) found that delaying first intercourse leads to a substantial increase in the probability that female students graduate high school. However, it is unclear whether the effect of abstinence extends to male students. Here we identify exogenous variation in the timing of first intercourse using a physical development index available for both females and males. Two-stage least squares estimates suggest that abstaining from sexual intercourse increases the probability that females graduate from high school, but has little effect on the educational attainment of males. This pattern of results is consistent with evidence from previous studies that males are less likely than females to suffer adverse psychological consequences from engaging in sexual intercourse at an early age.