The Labor Market and the American High School Girl 1890–1928
研究了20世纪初美国高中女生人数远超男生的现象，发现高中教育对女孩是更好的投资，因为这是她们获得工作技能的唯一途径，而男孩有其他途径。
Girls far outnumbered boys in American high schools at the turn of the century. Despite the fact that women on average spent far fewer years than men in the paid labor force, we argue that a high school education was a better investment for girls than for boys. This was because formal education offered the only opportunity for girls to obtain job-related skills, whereas it was but one of many such opportunities for boys.