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.
Goods and Services Tax Act 2014, implementing a 6% GST on 1 April 2015 under the Najib BN government, replacing the 10% Sales Tax and 6% Service Tax. Broadened the tax base from ~30,000 to ~472,000 registered businesses, reduced dependence on petroleum revenue, and raised RM 41bn in FY2015 (first nine months) and RM 41.2bn in FY2017. Politically costly amid 1MDB-scandal-related loss of confidence; Mahathir campaigned Pakatan Harapan 2018 election on GST abolition. GST reduced to 0% June 2018 and replaced by reintroduced SST September 2018 under PH government — the only national-VAT repeal among major economies in the 2010s.
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.