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.
Under PM Mart Laar, Estonia introduced Europe's first flat personal income tax at 26% (subsequently reduced to 20% by 2015). Eliminated nearly all deductions. Combined with corporate tax reform (only distributed profits taxed from 2000), free-trade regime with most countries, and aggressive digitisation of government services. Served as template for subsequent Eastern European flat-tax adoption: Lithuania 1994, Latvia 1995, Russia 2001, Slovakia 2004, Romania 2005, Ukraine 2004, Georgia 2005. Estonia's GDP per capita grew from ~25% of EU average (1994) to >75% (2019). Showcase for small-open-economy flat-tax advocates; outcomes are plausibly a joint effect of flat tax + EU accession + digitisation.
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.