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Add Two-Stage DiD estimator (Gardner 2022)#156

Merged

igerber merged 4 commits intomainigerber/diff-diff:mainfrom

two-stage-didigerber/diff-diff:two-stage-didCopy head branch name to clipboard

Feb 16, 2026

Conversation Commits4 (4)Checks Files changed

Merged

Add Two-Stage DiD estimator (Gardner 2022)#156
igerber merged 4 commits intomainfrom
two-stage-did

Commits

Commits on Feb 16, 2026

Add Two-Stage DiD estimator (Gardner 2022)

igerber
and
claude
committed
Address PR review: edge case fixes for TwoStageDiD

igerber
and
claude
committed
Fix zero-observation horizons/cohorts producing se=0 instead of NaN

igerber
and
claude
committed
Add Proposition 5 detection for unidentified long-run horizons

igerber
and
claude
committed

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