Immigration policy openness — work visas, family reunification, asylum processing, border enforcement posture.
Ease of hiring/firing, collective-bargaining scope, minimum wage rigidity, temporary/permanent contract regulation.
IRCA (Pub. L. 99-603), signed 6 November 1986. Granted legalisation to ~2.7M unauthorised immigrants who arrived before 1 January 1982; created Special Agricultural Worker programme for ~1.1M more. First employer sanctions regime — I-9 form, civil and criminal penalties for knowingly hiring unauthorised workers. Last comprehensive legalisation. Failed to deliver enforcement; unauthorised population rebuilt within a decade.
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.