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ceq-modern-did

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Use when a 《经济学(季刊)》 (China Economic Quarterly, CEQ) manuscript uses difference-in-differences with staggered adoption or heterogeneous treatment effects — to bring it into compliance with modern estimators (Callaway–Sant'Anna, de Chaisemartin–D'Haultfœuille, Sun–Abraham) instead of bare two-way fixed effects. Bare TWFE on staggered timing is a near-certain reject at CEQ.

When to use

• staggered adoption DID
• heterogeneous treatment effects
• Callaway–Sant'Anna estimation
• de Chaisemartin–D'Haultfœuille estimation
• Sun–Abraham estimation
• Goodman-Bacon decomposition
• event study plots
• negative weight diagnostics

When not to use

• single time point two-group DID
• bare two-way fixed effects without modern estimators

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