DiD-absorb HC2/HC2-BM: auto-route to fixed_effects internally#458

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wave-5-hc2-cr2-bm-extensions

May 17, 2026

Commits on May 17, 2026

DiD-absorb HC2/HC2-BM: auto-route to fixed_effects internally

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PR #458 R1: REGISTRY note + clustered/df-sensitive parity tests

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PR #458 R2: move auto-route ahead of multi-absorb-survey guard

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PR #458 R3 polish: clarify survey-design scope of the auto-route

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PR #458 R4 polish: preserve absorb+fixed_effects rejection on hc2/hc2_bm

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PR #458 R5 polish: pin HC2 SE against sandwich::vcovHC in-tree

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