Crowding Index
The index will measure divergence between an AI-exposed input basket and matched controls, with January 2024 = 100. It is a pressure gauge—not a claim that every divergence is caused by AI.
A calendar target is not permission to publish. If the checklist fails, the release remains “withheld” and the failure is logged on Changes.
Observed components
These official PPIs are reproducible inputs, not an index preview. The aggregate semiconductor series falling while storage rises is exactly why an intuitive composite can mislead.
Provisional exposed basket
Control rules
Publication gate
At least 80% of exposed and control basket weights have current observations.
Each series states whether scarcity should raise or lower the observation.
Every exposed series has a documented non-AI comparison or an explicit no-control flag.
The launch release publishes equal-weight and sensitivity results before selecting a headline.
Raw values, transformations and retrieval dates are downloadable and revision-aware.
One reviewer outside the project can reproduce the number from the file.
Open data
One row per published signal with unit, date, grade, caveat and source URL.