Behavioural Insights Projects
Discover projects applying behavioural science to policy from around the world. Add your own projects, whether completed or still ongoing, to contribute knowledge on BI applications across different countries, policy areas, and topics of interest.

Number of BI projects:
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Legend: Projects status
- Pre-registered project
- Completed project
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In Germany there are significant gaps in measles vaccination which lead to repeated outbreaks of the disease. Vaccinations do more than just protect the recipient against infection. They also protect people who cannot be vaccinated, for example infants or people with certain chronic illnesses. However, many adults do not know that they are not completely vaccinated against measles. In order to close this information and vaccination gap, wirksam regieren compared various possible ways to provide…
PROJECT SUMMARY
To increase uptake of flu vaccines and maintain a healthy workforce during the 2016-17 flu season, New York City’s Behavioral Design Team (NYC BDT) partnered with WorkWell NYC to design behaviorally informed emails to encourage New York City employees to visit a worksite flu clinic. One version of the redesigned email used the strategy of “enhanced active choice,” whereby employees were prompted to make a choice that had a clear right answer.
IMPACT
Behavioral emails more…
BETA is working with the Department of Social Services to evaluate the effectiveness of various behaviourally informed approaches on increasing workplace giving.
BI Project
Website Verbeterjehuis.nl helps homeowners choose the right sustainability measures: which…
This online experiment tested various ways in which sustainability measures for homeowners are presented on the website verbeterjehuis.nl, ‘improve your home’. The variant emphasising that the sustainability measures are 'recommended for your personal situation' proved to be most effective. This addition acts as an incentive to homeowners to install roof insulation or adopt other sustainability measures.
Why this experiment was conducted: verbeterjehuis.nl website optimisation
Homeowners…
BI Project
Nudge vs Superbugs: a behavioural economics trial to reduce the overprescribing of antibiotics
BETA and the Department of Health ran a trial to test the impact of personalised letters from Australia's Chief Medical Officer to high-prescribing GPs prompting them to consider reducing antibiotic prescribing where appropriate and safe.
In the spring of 2021, as COVID-19 vaccines became accessible to the US's general public, ideas42 and the Boston Transportation Department launched the FreeRide pilot program to encourage commuters to use transit (subway and bus) and bike share as they commute to work. The FreeRide program was designed to accomplish three main goals:
• Support small businesses and employees who have endured economic hardship during the pandemic.
• Shift employees away from single-occupancy vehicle use,…
BI Project
Filing tax returns correctly and on time: Is there value in expressing thanks to citizens and…
Are people more likely to file their tax returns correctly if they receive a thank-you in advance or afterwards? Analyses show that thank-you messages have no effect on compliance behaviour.
Why this experiment was conducted: positive alternative sought
To encourage citizens' tax compliance (i.e., paying their taxes on time and correctly), it is occasional practice to emphasise the risk of checks and fines in case of non-compliance. One drawback of this deterrent method is that it can damage…
Encouraging a more circular economy to lessen the impacts of climate change will require behavioural changes from Canadians. In partnership with Environment and Climate Change Canada (ECCC), we have launched a program of research to help meet some of Canada’s recycling targets—90% collection rate for plastic beverage containers, and these containers to have 50% recycled plastic content by 2030. This research will use insights and approaches from behavioural science to understand and increase…
Challenge
Tax delinquencies are a major problem for most tax administrations in the world. In Colombia, the National Accountant Office estimated the total outstanding debt to the National Tax Agency at $2.5 billion, which represents about 20 percent of estimated total tax evasion in 2014. Finding ways to reduce tax delinquencies is critical for both fiscal and equity considerations. A previous study compared messages about due liabilities delivered through three channels (letter, email, or…
As rewards increasingly become an instrument used by policymakers, it is important to find a reward mechanism that does not crowd out intrinsic motivation, is long lasting, and has positive spillover effects on third parties. A policy innovation introduced by the Municipality of Santa Fe (Argentina) allowed us to evaluate different mechanisms for rewarding tax compliance – participation in a lottery (financial motive), public recognition (moral channel), and provision of a visible and durable…