Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
IMF-conditioned 12.5% income-tax on salaries above 880 bolivianos introduced February 2003 to close 8.5% fiscal deficit. Triggered police mutiny 12-13 February; clashes with army in Plaza Murillo, La Paz; Quemazón attacks on political-party offices and presidential palace; ~33 deaths. Tax package withdrawn; foreshadowed Gas War later that year.
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.