Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
General government spending as share of GDP, excluding transfers already captured under fiscal.transfer_expansion to avoid double-counting.
Stability and Growth Pact adopted at Amsterdam European Council 17 June 1997 and formalised through Regulations 1466/97 and 1467/97. Designed by German Finance Minister Theo Waigel; committed euro-area states to keep deficits below 3% GDP in normal times and aim for close-to-balance medium-term fiscal positions; excessive-deficit procedure with sanctions. Cornerstone of EMU fiscal governance.
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.