Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
General government spending as share of GDP, excluding transfers already captured under fiscal.transfer_expansion to avoid double-counting.
Abolition of the Imposta Comunale sugli Immobili (ICI) on primary residences legislated via D.L. 93/2008 (27 May 2008) by the Berlusconi IV government — a flagship PdL-Lega Nord campaign promise. Cost to municipalities ~€3bn/year in lost revenue, partially compensated by state transfers. Reversed in essence by the Monti-era IMU (2011) which reinstated property taxation including primary residences; IMU on primary residences then abolished again under Letta/Renzi (2013-2014).
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.