Synthesis
What we know about guaranteed and basic income pilots
Stockton, Finland, Manitoba, Kenya, and beyond — what randomized and quasi-experimental evidence says about unconditional cash to working-age adults.
10 experiments synthesized · 7 positive, 3 mixed, 0 null, 0 negative
Guaranteed income proposals have moved from policy fringe to mainstream debate in less than a decade, largely on the strength of a handful of randomized and quasi-experimental pilots. The evidence base is now substantial enough to draw real conclusions, while remaining thin enough that almost any policy claim still finds at least one trial to point to.
The reliable findings across studies are that monthly unconditional cash transfers (a) do not substantially reduce labor force participation in working-age adults, (b) reduce volatility in household consumption rather than increasing it, and (c) produce measurable improvements in psychological wellbeing and food security. The contested findings are about scale, employment effects in tight labor markets, and how durable the effects are once transfers end.
What is striking across the literature is how often results that would have been politically inconvenient have been honestly reported by the institutions that ran the trials — including Finland's null result on employment and Stockton's mixed full-time-employment findings. That is the standard the field should aim to maintain.
Takeaway
Cash-transfer pilots can be designed and evaluated rigorously, and the existing evidence does not support the strongest claims of either advocates or critics. Pilots remain the most honest way to advance the debate.
The underlying experiments
Positive findings
7 experiments- Positive
Stockton SEED Guaranteed Income Pilot
SEED (Stockton Economic Empowerment Demonstration) · Stockton, CA, USA · 2021
Effect: Full-time employment: +28 percentage points over control by month 12; income volatility reduced; anxiety and depression scores improved significantly
- Positive
Child Tax Credit 2021 Expansion (American Rescue Plan)
US Treasury / Columbia University Center on Poverty and Social Policy / Brookings evaluation · United States (national) · 2021
Effect: Monthly child poverty rate dropped from 15.8% (June 2021, pre-expansion) to 11.9% (July 2021, first month of payments) — the largest single-month decline in child poverty ever recorded. Food insecurity among households with children dropped by 26%. Difficulty paying basic expenses declined by 30%. Effects fully reversed when payments expired in January 2022; child poverty climbed back to pre-expansion levels within two months. No significant negative effect on parental labor force participation was detected.
- Positive
Stockton SEED — Guaranteed Income Pilot
University of Tennessee / University of Pennsylvania EPRC · Stockton, CA, USA · 2019
Effect: Full-time employment: 28% treatment vs. 25% control at baseline; 40% treatment vs. 37% control at 12 months — treatment group employment increased more. Income volatility: significantly lower in treatment group. Mental health: significantly better (anxiety and depression scores). Physical health: no significant difference. Spending: primarily on food, clothing, utilities — not alcohol or cigarettes.
- Positive
Finland Universal Basic Income Experiment
KELA (Social Insurance Institution of Finland) · Finland · 2018
Effect: Employment: +6 days/year (modest positive); well-being score: +0.09 SD; trust in institutions: significantly higher; mental health symptoms: meaningfully reduced
- Positive
GiveDirectly — Large-Scale Basic Income in Rural Kenya
GiveDirectly / Princeton / MIT / UC Berkeley · Siaya County, Kenya · 2016
Effect: Consumption: +30% vs. baseline; assets: +40% in asset values; food security: significantly improved; psychological wellbeing: large positive effects on stress and happiness; hours worked: no reduction; local economic spillovers: significant — control villages within treated areas also showed consumption increases (~$2.50 for every $1 transferred, via multiplier effects)
- Positive
EITC Expansion and Labor Supply
U.S. Treasury / NBER researchers · United States · 1993
Effect: Labor force participation of single mothers increased 7.2 percentage points; among single mothers with less than high school education, +8.7pp
- Positive
Manitoba Mincome — Guaranteed Annual Income
University of Manitoba / Canadian federal and Manitoba governments · Manitoba, Canada · 1974
Effect: Hospitalization rates fell 8.5% relative to control communities; mental health hospitalizations fell significantly; domestic violence-related hospitalizations fell; high school completion increased; labor supply: only small reductions, primarily among mothers (who delayed return to work after childbirth) and teenagers (who stayed in school longer)
Mixed findings
3 experiments- Mixed
Finland Basic Income Experiment
Kela (Finnish Social Insurance Institution) · Finland · 2017
Effect: Employment: treatment group worked an average 6 more days than controls in 2018 (statistically significant but modest). Wellbeing: treatment group reported significantly higher life satisfaction (+0.09 SD), lower psychological distress, greater trust in institutions, and lower perceived bureaucracy. No significant increase in income.
- Mixed
Seattle/Denver Income Maintenance Experiment (SIME/DIME)
SRI International / Mathematica / US Department of Health, Education, and Welfare · Seattle, Washington and Denver, Colorado, USA · 1971
Effect: Husbands reduced hours by ~7%; wives by ~17%; female heads of single-parent households by ~12%. Marital dissolution rates were notably higher in the treatment arm — roughly 36–42% higher than control among black and white families — a finding that surprised researchers and became politically controversial. Effects on educational enrollment were positive (modestly increased schooling among adolescents in treatment families).
- Mixed
New Jersey Negative Income Tax Experiment
Mathematica / Office of Economic Opportunity / University of Wisconsin Institute for Research on Poverty · Trenton, Paterson, Jersey City, and Passaic, New Jersey; and Scranton, Pennsylvania, USA · 1968
Effect: Husbands reduced hours worked by approximately 5–6%; wives reduced hours by 20–30% (off a low base); overall family labor supply fell by 5–8%. Effects were considerably smaller than the policy debate had assumed but were measurable and statistically significant.
Open questions
- Do the wellbeing effects sustain after transfers end, or do they fade?
- How do effects differ in tight labor markets versus slack ones?
- What is the right comparison — to status-quo benefits, to in-kind aid, or to nothing?
If you've run a pilot that speaks to any of these, submit it to the registry.
Related policy areas