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A synthetic Wald ratio divides by uptake level instead of uptake contrast · case 05

A synthetic Wald ratio divides by uptake level instead of uptake contrast.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Input [meanY0,meanY1,meanD0,meanD1] describes a supplied synthetic IV design; return its Wald ratio, None when first stage is zero. No identification assumptions are inferred.

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
nonzero baseline	`6.666666666666667`	`10`	Failed

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