General government spending as share of GDP, excluding transfers already captured under fiscal.transfer_expansion to avoid double-counting.
Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
"Trinity Reform" of central-local fiscal relations adopted 27 June 2003 in Basic Policy for Economic and Fiscal Management: three pillars of (i) ¥3tn tax-revenue transfer from central to local governments (personal income tax to local resident tax); (ii) ¥4.7tn reduction in earmarked central subsidies to local governments; (iii) reform of Local Allocation Tax formula. Designed to reduce local-government fiscal dependence on central earmarks, increase own-source revenue share, and tighten LAT transfers.
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.