HAD Phase 2b: multi-period event-study extension (Appendix B.2)#350

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had-phase-2b-event-study

Apr 22, 2026

Commits on Apr 22, 2026

HAD Phase 2b: multi-period event-study extension (Appendix B.2)

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Address AI review P1: staggered filter retains never-treated units

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Address PR #350 CI review round 1: P0 constant-dose + P1 staggered-detection

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Address PR #350 CI review round 2: P1 first_treat cross-validation + P1 ordered time

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Address PR #350 CI review round 3: P0 chronological cohort sort + P3 docstrings

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Address PR #350 CI review round 4: P1 unused categorical levels trip balance check

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Address PR #350 CI review round 5: P2 to_dict JSON-safe

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