Task1 lpdid scaffold#343

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wenddymacro wants to merge 13 commits intoigerber:mainfrom

wenddymacro:task1-lpdid-scaffold

Commits on Mar 18, 2026

Add WooldridgeDiD (ETWFE) design spec

wenddymacro
and
claude
committed

Commits on Apr 7, 2026

Merge branch 'main' of https://github.com/wenddymacro/diff-diff into main
wenddymacro
committed

Commits on Apr 16, 2026

Commits on Apr 17, 2026

fix: align lpdid baseline estimation with stata
wenddymacro
committed

Commits on Apr 20, 2026

feat: add LPDiD estimator with Stata parity coverage
wenddymacro
committed