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.
The Harper government reduced the federal Goods and Services Tax (GST) value-added rate from 7% to 6% effective 1 July 2006 (Budget 2006) and then from 6% to 5% effective 1 January 2008 (Budget 2007). The change was a signature campaign commitment of the 2006 election. Parliamentary Budget Office and Department of Finance estimates put static revenue loss in the range of roughly C$12B per year at full implementation. Most tax economists criticised the move as lowering a relatively efficient consumption tax rather than cutting more distortionary income or payroll taxes; the government's stated rationale was visible, broad-based tax relief that would reach all households including non-filers.
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.