Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
Taxation of capital income (dividends, capital gains, inheritance, wealth). Distinct from corporate rate.
Wet Inkomstenbelasting 2001, effective 1 January 2001, replaced the 1964 income tax law with a three-box structure: Box 1 (labour and owner-occupied housing) progressive to 52% top; Box 2 (substantial shareholding) flat 25% (later 26.9%); Box 3 (savings and investments) notional 4% return taxed at 30% flat (effective 1.2% wealth tax). Eliminated prior capital-gains regime for most assets. Broadened base and reduced top statutory rates.
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.