Sector-specific licensing regimes, concentration / quota allocation, state-controlled entry (energy, telecoms, healthcare, banking).
Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
The Pure Food and Drug Act of 1906 prohibited interstate commerce in adulterated or misbranded food and medicines, required more truthful labelling, and gave the federal government a durable enforcement role in consumer-product safety. Paired with the Meat Inspection Act, it marked a decisive break from the weak and highly fragmented pre-1906 regime in which quality standards depended mostly on state law, reputation, or private litigation.
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.