Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
Statutory and effective corporate tax rates, treatment of depreciation, and international competitiveness.
General government spending as share of GDP, excluding transfers already captured under fiscal.transfer_expansion to avoid double-counting.
Campaign-pledge tax package announced within weeks of Gotabaya Rajapaksa's November 2019 presidential victory: VAT cut from 15% to 8%, abolition of the 2% Nation Building Tax, abolition of the Pay-As-You-Earn (PAYE) income tax, withholding-tax removal on interest, higher VAT-registration threshold (Rs 12mn to Rs 300mn/qtr), and corporate-tax rate reductions. Revenue collapse of ~2-3% of GDP (tax-to-GDP falling from ~12% to ~8.3% by 2021), among the sharpest peacetime revenue drops on IMF record, driving successive sovereign rating downgrades from Fitch/Moody's/S&P through 2020-2021 and narrowing market access ahead of the April 2022 default.
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.