Statutory and effective corporate tax rates, treatment of depreciation, and international competitiveness.
Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
Product-market regulation, entry barriers, licensing burdens, network-industry regulation, price controls.
Environmental regulation stringency — emissions caps, standards, phase-out mandates, carbon pricing, renewable portfolio standards.
The Trump administration's Section 232 steel and aluminum tariffs, imposed by Presidential Proclamations 9704 and 9705 of 8 March 2018 under the Trade Expansion Act of 1962, levied 25% tariffs on steel imports and 10% on aluminum on national-security grounds, with country-specific exclusions, quotas, and TRQs negotiated for Canada, Mexico (under USMCA), South Korea, Brazil, and others. The intended effect was to revive idle US steel and aluminum capacity, reverse perceived strategic-industry erosion, and signal American willingness to use tariffs unilaterally outside the WTO framework.
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.