Trade policy openness — tariffs, non-tariff barriers, FTAs, industrial protection.
Trans-Pacific Partnership signed 4 Feb 2016 Auckland between US + 11 Pacific-rim states (AUS, BRN, CAN, CHL, JPN, MYS, MEX, NZL, PER, SGP, VNM). Would have covered ~40% of global GDP. Included market-access concessions, IP rules, labour + environment chapters, ISDS investor-state dispute resolution. US withdrew 23 Jan 2017 (Trump executive order). Remaining 11 concluded CPTPP without US 8 Mar 2018 Santiago.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.