UBI is a regular cash payment to every adult, with no work requirements or means-testing. Proposals range from modest ($500/month, Yang 2020) to comprehensive ($1,000/month or more). Pilot programs (Stockton CA, Compton CA, Mississippi mothers, Finland's 2-year national pilot) have produced varied evidence on work participation, mental-health outcomes, and household stability.
Key design questions: universality (every citizen vs. low-income only?), funding (VAT, wealth tax, automation tax?), interaction with existing programs (replace SNAP/TANF/EITC or stack on top?), and citizenship/residency requirements.
The expanded Child Tax Credit during 2021 — a near-universal monthly cash benefit for families with children — was a partial natural experiment, with strong poverty-reduction effects.