Statutory and effective corporate tax rates, treatment of depreciation, and international competitiveness.
Ley 20.469 (21 Oct 2010) amended Impuesto Específico a la Actividad Minera with sliding-scale rates based on operational-margin (5% to 14%), exchanged in offer form for tax-stability-clause extensions to 2023. Raised post-earthquake reconstruction revenue ~USD 1bn/year at 2010-2014 copper prices. Preserved tax-stability-contract framework Chile mining sector had enjoyed under Decreto Ley 600 foreign-investment regime.
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.