School-Entry Policies and Skill Accumulation Across Directly and Indirectly Affected Individuals
研究了美国提高入学年龄下限的政策（将入学截止日期提前）如何增加人力资本积累并提高成年工资，发现截止日期每提前一个月，男性平均时薪增加约0.6%，且多数人群受益。
During the past half-century, there has been a trend toward increasing the minimum age a child must reach before entering school in the United States. States have accomplished this by moving the school-entry cutoff date earlier in the school year. The evidence presented in this paper shows that these law changes increased human capital accumulation and hence adult wages. Backing up the cutoff by one month increases average male hourly earnings by approximately 0.6 percent. The evidence also suggests that the majority of the cohort benefits from backing up the cutoff, not just those who must delay entry.