RQ2 · Anonymity set

## Does federating
houses grow the
crowd to hide in?

As instrumented — per-circuit entropy change
−0.96 bits
ΔH CI [−1.056, −0.864] · it SHRANK
↓ but why? ↓
Mechanism-corrected test (RQ2‑P3′)
ρ = +0.62
Spearman CI [0.594, 0.655] · decision: MIX
It behaves like a mix, not a funnel.
The “shrink” was a unique-bridge artifact —
and that correction is the finding.
13,500 pooled circuitsboth survive Holm‑7