General government spending as share of GDP, excluding transfers already captured under fiscal.transfer_expansion to avoid double-counting.
Targeted industrial and sectoral subsidies (renewable energy, chip manufacturing, agriculture, green hydrogen, etc).
Environmental regulation stringency — emissions caps, standards, phase-out mandates, carbon pricing, renewable portfolio standards.
$1.2 trillion (~$550bn new spending above baseline) bipartisan infrastructure package covering roads and bridges ($110bn), passenger and freight rail including Amtrak ($66bn), public transit ($39bn), broadband deployment ($65bn with BEAD program), power grid upgrades and transmission ($73bn), water and lead-pipe replacement ($55bn), EV charging network ($7.5bn), airports and ports, environmental remediation, and resilience funding. Passed Senate 69-30 (August 2021) and House 228-206 (November 2021) with bipartisan support. First large-scale US physical-infrastructure reauthorisation since ARRA-era investment; created new DOT and DOE programme offices and reauthorised the Highway Trust Fund.
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.