Trade policy openness — tariffs, non-tariff barriers, FTAs, industrial protection.
Financial-sector regulation — banking separation, capital requirements, cross-border activity rules, derivatives oversight.
London G20 Summit hosted by PM Gordon Brown produced a communique committing members to $1.1tn of additional IMF and multilateral-development-bank resources (incl. trebling IMF lending capacity to $750bn, $250bn SDR allocation, $250bn trade-finance pledges), anti-protectionism commitments, establishment of the Financial Stability Board (upgrading the FSF), and a push on tax-haven transparency (OECD grey/black-list publication on the summit day). A pivotal international-coordination moment arresting the collapse of trade finance in early 2009.
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.