FA-12689 / Causal analysis data contracts / Member archive

Ever-treated labeling allocates pre-initiation time to treatment · case 04

Ever-treated labeling allocates pre-initiation time to treatment.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Integer entry <= exit bounds half-open follow-up. start is treatment initiation or None; treatment persists. Return [unexposed duration, exposed duration].

Why this case matters

A deterministic synthetic study model isolates this data-contract defect; outputs alone establish no real-world causal identification.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
initiates during	`[0, 10]`	`[4, 6]`	Failed

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