Did, psm 及 did+psm 有何差异? did 要假定不可观测效应随时间变化趋势相同? @慧航 显示全部 关注者 784 本文介绍的是事件研究法 (event study) 在 stata 中的实现命令 eventdd,该命令由 damian clarke 和 kathya tapia schythe 在 2020 年共同开发。与以往关于事件研究法的介绍不同,本文将侧.
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