The Effect of Part‐Time Work on Wages: Evidence from the Social Security Rules
利用社会保障规则导致的工作时间变化，识别出兼职对工资的因果效应：男性每周工时从40小时减至20小时会导致25%的工资惩罚，但女性中未发现显著效应；忽视工时与工资联合决定的模型会低估税收变化对劳动力供给的影响约26%。
This article identifies the part-time wage effect, using hours variation caused by the social security rules. We show that work hours and wages drop sharply at ages 62 and 65. We argue that the hours decline causes the wage decline, resulting in a 25% wage penalty for men who cut their work week from 40 to 20 hours. However, we find little evidence for such an effect among women. We also show that models that fail to account for the joint determination of hours and wages will understate the labor supply response to a tax change by about 26%.