一、理论方法讲解

• 1. Conventional practice 传统DiD估计方法
• 1.1 Basicideas and Model setup (2 time periods*2 groups)
• DiD估计方法的基本思想和模型设定（2期*2组的简单情形）
• 1.2 Extensions DiD扩展情形
• (1) Multiple time periods or multiple groups (forinstance, the staggered DiD estimation)
• 多时期、多个组别情况下的DiD，例如，处理状态在多期陆续发生、处理组不断增加的渐进DiD
• (2) Repeated Cross-Sections DiD方法在重复截面数据中的应用
• (3) Two-Dimensional Cross-Sections (for instance,Cohort DiD)
• DiD方法在横截面数据中的应用（例如，队列DiD）
• (4) Fuzzy DiD 模糊DiD
• (5) DDD, DDDD, … 多重差分
• 1.3 Estimation and inference DiD模型的估计和统计推断
• (1) Basic model specification 基准模型设定
• (2) Two-way fixed effects linear regressionspecification 双重固定效应线性回归模型设定
• a. Static TWFE model 静态TWFE模型
• b. Dynamic TWFE model (Event study) 动态TWFE模型（事件分析）
• 2. Recent development DiD方法的新发展
• 2.1 Interpretation of the TWFE estimators (with multiple time periods or multiple groups)
• 正确理解TWFE估计量
• 2.2 Problemsof the TWFE estimators with heterogeneous treatment effects
• TWFE估计量在存在异质性处理效应情况下存在的问题
• 2.3 Alternative estimators 存在异质性处理效应情况下的新兴估计方法
• (1) Estimators based on some “building blocks”
• 基于某种形式的“building blocks”的估计量
• a. Estimating only the instantaneous treatmenteffect 仅估计即时效应
• b. Estimators based on group-time ATT 基于组-时间分组的估计量
• c. Estimators based on cohort-specific ATT 基于队列分组的估计量
• (2) Two-stage estimators/imputation estimators 两阶段估计量

二、操作和论文复刻

• 1. Applications with Conventional DiD 传统DiD的应用
• * Chen, Y., Fan, Z., Gu, X., Zhou, L., “Arrival of Young Talent: The
• Send-down Movement and Rural Education in China.” American Economic Review
• * Li, P., Lu, Y., Wang, J., “Does Flattening Government Improve Economic Performance? Evidence from China.”, Journal of Development Economics
• Duflo, E., 2001, “Schooling and Labor Market Consequences of School Construction in Indonesia: Evidence from an Unusual Policy Experiment”, American Economic Review
• 2. Applications with Updated Practices DiD新的理论方法的应用
• * Baker, A. C., Larcker, D. F., Wang, C. C. Y., 2022. “How Much Should We Trust Staggered Difference-in-Differences Estimates.” Journal of Finance
• Cengiz, D., Dube, A., Lindner, A., Zipperer, B., 2019. “The Effect of Minimum Wages on Low-Wage Jobs.” Quarterly Journal of Economics
• Biasi, B., Sarsons, H., 2022, “Flexible Wages, Bargaining, and the Gender Gap.” Quarterly Journal of Economics
• Vannutelli, S., 2020. “From Lapdogs to Watchdogs: Random Auditor Assignment and Municipal Fiscal Performance.” Working Paper.