MFG Calcs Signals

Observed Effective-Rate and Import-Value Change

Name: Observed Effective-Rate Step and Import-Value Change
Creator: MFG Calcs
License: https://creativecommons.org/licenses/by/4.0/

For eligible U.S. manufacturing families, compare import customs value before and after a large observed increase in the effective calculated-duty rate.

What this Signal shows

Compare import customs value before and after large observed effective calculated-duty rate increases, with explicit non-causal caveats.

Cadence, source and downloads

Cadence: Monthly, refreshed automatically as USITC posts new customs data.
From USITC DataWeb per-family monthly customs value and calculated duty. Observational, not causal; value, not volume. Full method at /signals/tariff-effect.
Free to download as Board (CSV), Full board (JSON), Methodology (JSON) under CC BY 4.0.

Last reviewed 2026-10-01.