Tax & Revenue· Social norms
PositiveSocial Norm Tax Letters
The Dominican Tax Authority randomly assigned businesses to receive letters comparing their tax compliance to similar firms. The social norm…
Dominican Republic · 2019View →
Public Experiment Registry
What has actually been tried.
A knowledge base of real policy experiments — randomized trials and rigorous evaluations run by governments, municipalities, universities, and civic institutions. Every record includes the question, design, effect size, and decision taken. Null and negative results are included. That is the point.
110
Total experiments
91
Positive results
5
Null results
21
Countries represented
110 of 110
Tax & Revenue· Simplification
PositiveSimplified Tax Penalty Payment
Reducing the administrative friction of paying a tax penalty had a larger effect than deterrence messaging alone. The billing code in the si…
Indonesia · 2022View →
Tax & Revenue· Information
PositiveFiscal Exchange Framing on Tax Bills
Reframing a tax bill as evidence of public goods produced—not a government demand—increased payment among delinquents. The effect was amplif…
Argentina · 2020View →
Tax & Revenue· Personalization
PositivePersonalized SMS for Court Fine Repayment
Among 12 message variants tested, simply including the debtor's name in an SMS dramatically increased repayment. Including the exact amount …
United Kingdom · 2012View →
Benefits Enrollment· Simplification
PositiveSNAP Enrollment Information Letters for Seniors
Most eligible seniors did not enroll in SNAP despite qualifying. An information letter tripled enrollment relative to do-nothing. Adding act…
Pennsylvania, USA · 2016View →
Benefits Enrollment· Simplification
PositiveStreamlined ACA Health Insurance Enrollment
Reducing enrollment to a single checkbox—rather than requiring a multi-step application—had the largest effect of any communication tested. …
Massachusetts, USA · 2021View →
Benefits Enrollment· Simplification
PositiveFlexible SNAP Interview Scheduling
SNAP requires an in-person or phone interview before approval. Letting applicants choose when and how that interview happens—rather than rec…
Los Angeles, USA · 2022View →
Energy & Environment· Social norms
PositiveOpower Home Energy Reports
Telling households how their energy use compared to similar neighbors—and providing a simple smiley face showing whether they were above or …
United States (multi-site) · 2012View →
Energy & Environment· Default
PositiveGreen Electricity Opt-Out Default
Simply making green energy the starting position—requiring households to actively switch away rather than actively choose it—increased adopt…
Germany · 2016View →
Energy & Environment· Social norms
PositiveSocial Comparison Home Water Reports
The Opower-style neighbor comparison design applied to water produced a larger proportional effect than in energy (5% vs. 2%), likely becaus…
United States (multi-site) · 2014View →
Education· Human capital
PositiveProject STAR — Small Class Size
Project STAR is one of the largest and most-cited education RCTs ever conducted. Students randomly placed in small classes outperformed peer…
Tennessee, USA · 1989View →
Education· Human capital
PositiveUniversal Free School Breakfast Program
Providing free breakfast in schools before the school day produced measurable gains in academic attainment equivalent to two additional mont…
Wales, UK · 2007View →
Libraries· Simplification
PositiveLibrary Fine Elimination
Chicago's fine elimination produced an immediate surge in returned materials as patrons with long-outstanding items resolved their accounts.…
Chicago, USA · 2019View →
Libraries· Simplification
PositiveLibrary Fine Elimination — Return Rate Impact
Counterintuitively, removing the financial penalty for late returns improved return rates, not worsened them. Patrons who had avoided the li…
Salt Lake City, USA · 2019View →
Public Health· Information
PositiveCommunity-Level Mask Promotion — COVID-19
The largest cluster-randomized trial of community masking ever conducted found that free mask distribution alone had little effect, but pair…
Bangladesh · 2020View →
Public Health· Information
NullCOVID-19 Vaccination SMS Reminders
A statewide RCT with 700,000 participants found that SMS nudges had vanishingly small effects on COVID vaccination. The absolute difference …
Rhode Island, USA · 2021View →
Public Health· Personalization
PositiveOwnership Framing for COVID-19 Booster Uptake
Framing a vaccine appointment as already belonging to the patient ('your dose is reserved') outperformed both no contact and a standard remi…
United States · 2022View →
Public Health· Information
PositiveSMS Reminders for Childhood Vaccination — Meta-Analysis
Pooling 22 randomized trials, SMS reminders for childhood vaccination produced an 11% relative increase in coverage. The effect is smaller t…
Global (multiple countries) · 2024View →
Parks & Public Space· Community engagement
PositiveCommunity Park Advisory Boards
The first RCT of a park-based physical activity intervention in the US. Parks randomly assigned to have structured community advisory boards…
Los Angeles, USA · 2014View →
Administrative Process· Simplification
PositiveForeclosure Prevention — Administrative Burden Reduction
Among households at similar risk of foreclosure, those facing simplified application processes received help at dramatically higher rates—an…
United States · 2018View →
Administrative Process· Simplification
PositiveOnline Permit System Implementation
Moving permit applications online—eliminating the requirement to appear in person during office hours, fill out paper forms, and return for …
Boone County, USA · 2021View →
Administrative Process· Personalization
PositiveRental License Renewal — Behavioral Messaging
Philadelphia tested three message frames for prompting rental license renewal. All outperformed the control, but the frame emphasizing what …
Philadelphia, USA · 2020View →
Voter Engagement· Information
PositiveVoter Registration Postcards to Unregistered Eligible Citizens
State election agencies randomly selected eligible non-registrants to receive postcards explaining how to register. Treatment recipients reg…
United States · 2019View →
Voter Engagement· Information
PositiveVoter Registration SMS — Local Authorities
UK local authorities and an advocacy organization independently ran RCTs testing SMS voter registration reminders. Both found positive effec…
United Kingdom · 2022View →
Housing· Housing
MixedMoving to Opportunity Housing Vouchers
Moving to Opportunity is one of the most consequential policy RCTs ever conducted. The initial evaluation found limited short-term economic …
Baltimore, Boston, Chicago, Los Angeles, New York · 1994View →
Public Safety· Targeting
NullKansas City Preventive Patrol Experiment
For decades, the dominant assumption in policing was that more patrol cars on streets reduced crime and made residents feel safer. This land…
Kansas City, USA · 1972View →
Financial Services· Personalization
MixedPersonalized Loan Repayment SMS Reminders
Of the 12 message variants tested, the single most effective element was including the loan officer's name rather than the borrower's name—a…
Philippines · 2013View →
Financial Services· Information
PositiveBuy-Now-Pay-Later SMS Late Payment Reduction
A Dutch financial regulator partnered with a buy-now-pay-later provider to test whether pre-due-date SMS reminders reduced late fees. They d…
Netherlands · 2024View →
Early Childhood· Human capital
PositivePerry Preschool Project
The Perry Preschool Project is the most influential early childhood intervention study in existence. Followed for over 40 years, children ra…
Ypsilanti, Michigan, USA · 1962View →
Early Childhood· Human capital
PositiveNurse-Family Partnership — Elmira Trial
David Olds designed one of the most replicated social intervention experiments in history. Nurses visiting low-income first-time mothers dur…
Elmira, New York, USA · 1977View →
Early Childhood· Human capital
PositiveJamaica Stunting Study — Stimulation + Nutrition
The Jamaica study is remarkable for its long follow-up and the specificity of its finding: psychosocial stimulation (play, reading, structur…
Kingston, Jamaica · 1986View →
Cash Transfers· Cash transfer
PositivePROGRESA Conditional Cash Transfer
PROGRESA is the most influential anti-poverty experiment in modern policy history. Its village-level randomization allowed clean causal iden…
Rural Mexico · 1997View →
Cash Transfers· Cash transfer
PositiveGiveDirectly Unconditional Cash Transfers
GiveDirectly's Kenya experiment directly challenged the assumption that poor people cannot be trusted with unrestricted cash. Recipients inv…
Western Kenya · 2011View →
Cash Transfers· Cash transfer
MixedNew York City Family Rewards
New York adapted PROGRESA for a US urban context. The program reduced poverty significantly while payments were active, increased health cov…
New York City, USA · 2007View →
Public Safety· Targeting
PositivePhiladelphia Hot Spots Policing
Rather than spreading patrol thinly across precincts, hot spots policing concentrates resources at the tiny fraction of locations responsibl…
Philadelphia, USA · 1995View →
Public Safety· Targeting
PositivePhiladelphia Foot Patrol Experiment
While car patrol studies (including Kansas City) showed limited crime effects, this experiment tested a different form: officers on foot in …
Philadelphia, USA · 2009View →
Public Safety· Targeting
NullBody-Worn Camera RCT — Washington DC
Body-worn cameras had been widely adopted based on small observational studies suggesting they reduced complaints and use of force. The DC e…
Washington, DC, USA · 2016View →
Public Health· Price signal
MixedRAND Health Insurance Experiment
The RAND HIE is the most important health insurance experiment ever conducted. The core finding—that free care increases use by 30% with no …
United States (6 sites) · 1974View →
Public Health· Information
MixedOregon Medicaid Lottery
Oregon's random Medicaid lottery created a rare natural experiment in a domain where RCTs are normally impossible. Gaining coverage dramatic…
Oregon, USA · 2008View →
Housing· Housing
PositiveAt Home / Chez Soi — Housing First
At Home/Chez Soi is the largest Housing First RCT ever conducted. The standard model of homeless services required people to demonstrate sob…
Vancouver, Winnipeg, Toronto, Montréal, Moncton, Canada · 2009View →
Transportation· Price signal
PositiveLondon Congestion Charge
London's congestion charge was the first large-scale urban road pricing experiment in a Western democracy. The £5 daily fee produced an imme…
London, UK · 2003View →
Transportation· Price signal
Positive5p Plastic Bag Charge
The 5p bag charge produced one of the most dramatic behavior changes measured in modern environmental policy. A near-trivial cost completely…
England, UK · 2015View →
International Development· Cash transfer
PositiveColombia Familias en Acción
Colombia's Familias en Acción provided one of the cleanest tests of the conditional cash transfer model outside Mexico. The municipality-lev…
Rural Colombia · 2001View →
International Development· Human capital
PositiveIndia Midday Meal Scheme
India's Midday Meal Scheme became the largest school feeding program in the world. The staggered state rollout created a natural experiment …
India (national, with state variation) · 2002View →
International Development· Price signal
PositiveKenya Insecticide-Treated Bednet Distribution
This study addressed a fundamental debate in development economics: does charging even a small price for a health product increase recipient…
Western Kenya · 2003View →
International Development· Cash transfer
PositiveBRAC Graduation Programme
The BRAC Graduation Programme tackled a structural gap in anti-poverty programs: existing approaches didn't reach the ultra-poor, who lacked…
Bangladesh (original); replicated in 10 countries · 2007View →
Public Health· Human capital
MixedHead Start Impact Study
The Head Start Impact Study is one of the most politically contentious education evaluations in US history. Children gained meaningfully dur…
United States (nationally representative) · 2002View →
Public Safety· Community engagement
MixedCure Violence — Chicago
Cure Violence treats gun violence as a contagious disease, using credible messengers to interrupt transmission before shootings cascade. The…
Chicago, USA · 2000View →
Housing· Default
PositiveInclusionary Zoning Affordability Audit
Chicago's analysis of its inclusionary zoning ordinance found that the affordable unit requirement, combined with density bonuses that allow…
Chicago, IL, United States · 2018View →
Housing· Housing
PositiveRapid Re-Housing vs. Transitional Housing
The Columbus evaluation added to a growing body of evidence that placing homeless individuals directly into permanent housing — with short-t…
Columbus, OH, United States · 2016View →
Public Safety· Information
MixedPretrial Risk Assessment Tool (Arnold Foundation)
The Arnold Foundation's Public Safety Assessment provides judges with algorithmic flight risk and new-crime risk scores to inform bail decis…
United States (multiple jurisdictions) · 2014View →
Public Safety· Human capital
PositiveCognitive Behavioral Therapy for Juvenile Offenders
The BAM evaluation found that a school-based cognitive behavioral therapy program reduced violent crime arrests among at-risk youth by 44% i…
Chicago, IL, United States · 2012View →
Public Safety· Information
MixedBan the Box Employment Policy
New York's ban the box policy produced the double-edged result that audit studies had predicted: it improved some outcomes for people with r…
New York City, NY, United States · 2015View →
Financial Services· Price signal
MixedSeattle Minimum Wage Study
The University of Washington study of Seattle's minimum wage increase found a counterintuitive result: average earnings for low-wage workers…
Seattle, WA, United States · 2016View →
Financial Services· Human capital
PositiveYear Up Job Training Evaluation
The MDRC evaluation of Year Up, using random assignment created by program oversubscription, found one of the largest sustained earnings eff…
United States (multiple cities) · 2018View →
Tax & Revenue· Price signal
PositiveEITC Expansion and Labor Supply
The EITC expansion of 1993 constitutes one of the most studied natural experiments in labor economics. Researchers using difference-in-diffe…
United States · 1993View →
Energy & Environment· Default
PositiveGreen Investment Default in Retirement Plans
Nest's change of the default investment option for 10 million UK workers to a responsible investment fund is perhaps the largest-scale appli…
United Kingdom · 2020View →
Energy & Environment· Price signal
PositiveBritish Columbia Carbon Tax
British Columbia's carbon tax is frequently cited as the strongest real-world evidence that carbon pricing reduces emissions without depress…
British Columbia, Canada · 2008View →
Energy & Environment· Social norms
PositiveSolar Panel Adoption Peer Effects
The Yale/LBNL study documented strong peer effects in solar adoption — neighbors who can see solar panels on nearby rooftops are significant…
Connecticut, United States · 2014View →
Parks & Public Space· Community engagement
PositiveUrban Tree Canopy and Heat Equity
The 30-city urban tree equity program systematically documented what urban foresters have long believed but rarely measured at scale: target…
United States (30 cities) · 2021View →
Voter Engagement· Default
PositiveAutomatic Voter Registration — Oregon
Oregon's Motor Voter (AVR) system registered 272,000 previously unregistered citizens in its first year, disproportionately young and lower-…
Oregon, United States · 2016View →
Administrative Process· Information
PositiveSMS Wait Time Notifications for NHS Appointments
The NHS/BIT experiment demonstrated that a simple personalized SMS reminder reduced appointment non-attendance by 26%. The mechanism combine…
England, United Kingdom · 2012View →
Administrative Process· Simplification
PositiveBusiness Permit Processing Streamlining
Phoenix's concurrent permit review pilot tested whether the sequential review process — in which zoning, building, and fire reviews happen o…
Phoenix, AZ, United States · 2019View →
Public Safety· Information
PositiveCourt Date SMS Reminders to Reduce Failure to Appear
The ideas42/NYC experiment found that most failure-to-appear events for low-level summons are driven by forgetting rather than intent to eva…
New York City, NY, United States · 2015View →
Transportation· Price signal
PositiveStockholm Congestion Pricing Trial
Stockholm's congestion pricing trial is the gold standard for evaluating road pricing. The 7-month trial produced an immediate 22% reduction…
Stockholm, Sweden · 2006View →
Transportation· Simplification
PositiveBogotá TransMilenio BRT System
Bogotá's TransMilenio transformed one of the world's most congested cities by replacing a chaotic private bus network with a structured, ded…
Bogotá, Colombia · 2000View →
Transportation· Default
PositiveLondon Cycle Hire Health Outcomes
The London bikeshare health study used a matched cohort design to estimate that regular users of the Santander Cycles scheme experienced a 4…
London, UK · 2012View →
Financial Services· Information
PositiveM-Pesa Mobile Money and Poverty Reduction
The M-Pesa study used geographic variation in agent rollout as an instrument for mobile money access, finding meaningful consumption gains —…
Kenya · 2016View →
Financial Services· Commitment device
PositiveCommitment Savings Accounts for Agricultural Workers
The Equity Bank Kenya commitment savings experiment found that farmers who were offered accounts where they could restrict their own withdra…
Kenya · 2008View →
Financial Services· Human capital
PositiveFinancial Coaching for Low-Income Adults
The CFPB financial coaching trial found meaningful improvements in credit scores, savings balances, and bill payment behavior at 12 months, …
United States (multiple cities) · 2015View →
Public Health· Information
NullClean Cookstove Adoption in Rural India
The clean cookstove experiment produced a sobering null result despite high initial enthusiasm. Although households adopted the stoves when …
India (Orissa state) · 2016View →
Public Health· Default
PositiveChlorine Dispensers at Water Sources
The chlorine dispenser experiment found that placing chlorine at the point of collection — removing the step of transporting it home — raise…
Western Kenya · 2007View →
Public Health· Information
PositiveVaccination Reminders and Incentives — India
Banerjee and Duflo's vaccination study found that a reliable, predictable schedule alone nearly tripled immunization rates, and adding a sma…
Rajasthan, India · 2010View →
International Development· Cash transfer
MixedImpact of Microcredit — Mexico
The Compartamos microcredit evaluation was one of seven coordinated randomized evaluations of microcredit conducted under J-PAL auspices. To…
Rural Mexico · 2015View →
International Development· Human capital
PositivePrimary School Deworming — Kenya
The Kenya deworming study found that mass treatment with a cheap, safe drug increased school participation substantially — and that the effe…
Western Kenya · 1998View →
International Development· Community engagement
PositiveVillage Savings and Loan Associations — Africa
The VSLA evaluation tested whether communities can create their own financial infrastructure without external capital injection. They can — …
Sub-Saharan Africa (multiple countries) · 2010View →
Benefits Enrollment· Simplification
PositiveSNAP Enrollment Simplification — Vermont
Vermont's SNAP simplification demonstrated that the administrative burden of applying for food assistance was itself a barrier to enrollment…
Vermont, USA · 2014View →
Benefits Enrollment· Information
PositiveAutomated Medicaid Renewal Reminders
Rhode Island's Medicaid renewal reminder experiment addressed one of the most common causes of coverage gaps: members who are still eligible…
Rhode Island, USA · 2016View →
Cash Transfers· Cash transfer
PositiveFinland Universal Basic Income Experiment
Finland's basic income experiment was the first national-level RCT of unconditional cash for unemployed adults in a high-income country. The…
Finland · 2018View →
Cash Transfers· Cash transfer
PositiveStockton SEED Guaranteed Income Pilot
The Stockton SEED experiment was the first randomized evaluation of a guaranteed income in a mid-sized American city. The most counterintuit…
Stockton, CA, USA · 2021View →
Early Childhood· Human capital
PositiveUK Sure Start Local Programmes
The UK's Sure Start evaluation used a regression discontinuity design based on geographic deprivation cutoffs to estimate causal effects on …
England, United Kingdom · 2010View →
Early Childhood· Human capital
PositiveSeattle Preschool Program RCT
Seattle's Preschool Program produced one of the few lottery-based RCTs of a universal municipal pre-K program in the United States. The lott…
Seattle, WA, USA · 2017View →
Public Safety· Human capital
PositiveBecoming a Man (BAM) — Cognitive Behavioral Therapy
The BAM experiment is unusual in simultaneously reducing violent crime and improving schooling outcomes through a low-cost, school-based int…
Chicago, IL, USA · 2015View →
Housing· Housing
PositiveDenver Social Impact Bond — Supportive Housing for Chronic Homelessness
The Denver experiment tested the Housing First model — giving chronically homeless individuals permanent housing without behavioral prerequi…
Denver, CO, USA · 2016View →
Housing· Information
PositivePhiladelphia Eviction Right to Counsel
The Philadelphia eviction representation experiment exposed a structural asymmetry in housing court: landlords routinely appeared with attor…
Philadelphia, PA, USA · 2019View →
Education· Human capital
PositiveChicago STAR Scholarship — Dual Enrollment
The Chicago STAR experiment tested whether a college promise — information about guaranteed tuition-free access combined with advising — cou…
Chicago, IL, USA · 2016View →
International Development· Price signal
PositiveRwanda Performance-Based Financing for Health
Rwanda's health performance-based financing experiment was one of the first rigorous RCTs of pay-for-performance in a low-income country hea…
Rwanda · 2010View →
International Development· Cash transfer
PositiveSouth Africa Child Support Grant
The South Africa Child Support Grant is one of the most thoroughly studied small-value cash transfer programs in the world. The regression d…
South Africa · 2009View →
International Development· Cash transfer
PositiveEthiopia Productive Safety Net Programme
Ethiopia's Productive Safety Net Programme is one of the largest social protection programs in sub-Saharan Africa and among the most thoroug…
Ethiopia · 2008View →
Transportation· Price signal
PositiveBoston School Zone Automated Speed Cameras
Boston's school zone speed camera experiment directly tested the most common objection to automated enforcement: that it reduces violations …
Boston, MA, USA · 2021View →
Benefits Enrollment· Community engagement
NullUK Troubled Families Programme — National Evaluation
The UK Troubled Families Programme is one of the most important null results in British social policy. The government had claimed that 99% o…
England, United Kingdom · 2017View →
Administrative Process· Simplification
PositiveLos Angeles VITA Free Tax Preparation Access
The Los Angeles VITA experiment demonstrated that proximity and scheduling, not awareness, were the binding constraints on free tax preparat…
Los Angeles, CA, USA · 2018View →
Public Health· Community engagement
MixedIndia Swachh Bharat Mission — Open Defecation Free
The Swachh Bharat Mission is one of the largest public health infrastructure programs in history, and its evaluation illustrates the differe…
India · 2018View →
International Development· Cash transfer
PositiveBrazil Bolsa Família Conditional Cash Transfer
Brazil's Bolsa Família is the world's largest conditional cash transfer programme and one of the most studied. The regression discontinuity …
Brazil · 2007View →
Public Safety· Targeting
PositiveMinneapolis Foot Patrol Experiment
The Minneapolis foot patrol experiment was designed partly to test whether the Kansas City and Philadelphia results generalized to a third c…
Minneapolis, MN, USA · 2019View →
Voter Engagement· Social norms
PositiveMichigan Social Pressure Voting Mailer
The Michigan social pressure experiment produced the largest voter mobilization effect ever documented in a randomized study — 8.1 percentag…
Michigan, USA · 2006View →
Voter Engagement· Simplification
PositiveOregon Universal Vote by Mail
Oregon's vote-by-mail system converts the act of voting from a public event requiring travel and coordination to a private, at-home activity…
Oregon, USA · 2000View →
Voter Engagement· Community engagement
PositiveDoor-to-Door GOTV Canvassing — New Haven
The New Haven canvassing experiment established one of the most durable findings in political science: personal contact substantially increa…
New Haven, CT, USA · 2000View →
Financial Services· Commitment device
PositiveSave More Tomorrow (SMarT) Commitment Program
Save More Tomorrow is one of the most consequential behavioral economics experiments ever conducted. The core insight: present bias makes it…
United States · 2004View →
Education· Human capital
PositiveYear Up Young Adult Job Training Program
Year Up is one of the few job training programs with a lottery-based RCT showing sustained, large earnings effects. The 30% earnings increas…
United States · 2018View →
Education· Human capital
MixedJob Training Partnership Act (JTPA) National RCT
The JTPA evaluation is one of the most important experiments in US social policy — not because it confirmed what worked, but because it docu…
United States · 1994View →
Public Health· Human capital
PositiveIMPACT Collaborative Care for Late-Life Depression
The IMPACT trial is the landmark experiment in collaborative care for depression — a model that integrates mental health treatment into prim…
United States · 2002View →
Public Safety· Community engagement
PositiveBoston Ceasefire — Group Violence Intervention
The Boston Ceasefire experiment is the foundational study in focused deterrence — a violence reduction strategy that combines a credible enf…
Boston, MA, USA · 1996View →
Public Safety· Targeting
PositiveHawaii's Opportunity Probation with Enforcement (HOPE)
HOPE Probation inverted the conventional logic of deterrence. Standard probation supervision is infrequent and lenient for most violations, …
Honolulu, HI, USA · 2004View →
Public Safety· Human capital
PositiveChicago One Summer Plus — Summer Jobs and Violence Reduction
The One Summer Plus experiment produced one of the most surprising findings in criminology: a low-cost summer jobs program reduced violent c…
Chicago, IL, USA · 2012View →
Education· Human capital
PositiveCareer Academies — MDRC Long-Term Evaluation
The Career Academies evaluation is one of the longest-running randomized studies in US education policy. Eight years after expected graduati…
Multiple US cities · 1993View →
Early Childhood· Community engagement
PositiveBig Brothers Big Sisters — National Impact Study
The BBBS national impact study is the most rigorous evaluation of one-to-one community mentoring ever conducted. Across 8 agencies in 8 citi…
Multiple US cities · 1992View →
Administrative Process· Community engagement
PositivePorto Alegre Participatory Budgeting
Porto Alegre's participatory budgeting experiment is the most widely replicated governance innovation of the late 20th century. Beginning wi…
Porto Alegre, Brazil · 1989View →
Public Health· Information
MixedMexico Seguro Popular — Health Insurance Coverage Expansion
The Seguro Popular evaluation used a randomized cluster design — rare in large-scale health insurance research — to test whether extending i…
Mexico · 2002View →
Libraries· Information
PositiveNew York Public Library Summer Reading Text Reminders
The NYPL summer reading experiment is one of the clearest demonstrations of the attention deficit problem in public programming: most childr…
New York City, USA · 2015View →
Run an experiment. Add a record.
The registry grows as institutions experiment and publish. If you have run a civic experiment with measurable outcomes, we want it here — including null results.