Tax amnesties, a limited-time opportunity for a specified group of taxpayers to pay a defined amount of tax liabilities, are broadly used across countries because they generate short-term revenue gains. However, evidence suggest that tax amnesties fail to have long-term effects, and in some cases, they generate negative effects on compliance. With the goal of evaluating the impact of tax amnesties, this experiment relies on the behavioral principle of limited attention and redesigns the…
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.
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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…
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…
BI Project
Give Your Car (and Wallet) a Break: Enabling more Sustainable Commutes in Pristina, Kosovo
Air pollution is a serious health and environmental problem in many cities, including Pristina, Kosovo, where poor air quality is a frequent issue. Private cars and taxis are a major mode of transportation in Pristina, contributing significantly to both pollution and congestion, which is most problematic at peak traffic hours when individuals commute to and from work. To tackle this issue, ideas42 partnered with the UNDP Kosovo to design a behavioral intervention with the unifying slogan, "Give…
To gain insight into citizen perspectives on the themes of energy and climate, the Ministry of Economic Affairs and Climate periodically conducts public research. The Public Monitor Climate and Energy 2021 focuses on knowledge, attitude and behaviour of citizens in the field of the climate and energy transition.
In partnership with the Public Health Agency of Canada’s Office of Behavioural Science (BeSciO), the Privy Council Office’s Impact and Innovation Unit (IIU) has launched a multi-wave public opinion research survey to better understand public health challenges in Canada. The 'Health, Attitudes, and Behavioural Insights Trends' (HABIT) survey, combines research methods from the field of behavioural science (BeSci) with robust policy analysis to help inform government policies, programs, and…
We seek to increase voluntary appearances for people with outstanding Warrants to Arrest (WTA) through reminder phone calls from Māori Wardens and Police. This Auckland-based project follows a proof-of-concept trial in the Eastern District, in which Māori Wardens made phone calls to people with outstanding WTAs and we compared voluntary appearances for those who were reached via phone to those who were not.
While this first trial showed indicative evidence that phone calls may be effective,…
BI Project
Helping people get more out of language: How can you help individuals with limited literacy skills…
The 'Doe meer met taal' (Get more out of language) campaign was launched to reach out to individuals with limited literacy skills whose mother tongue is Dutch. At its conclusion, people in the target group said they felt more motivated to improve their language skills. They are also more inclined to take proactive steps, for example by engaging in language-related activities at home. 66,000 people visited the campaign website.
Why this experiment was conducted: everyone should be equipped with…
BI Project
Empirical testing of the impact on consumer choice resulting from differences in the composition of…
Differences in the composition of seemingly identical branded food products (DC-SIP) has been a source of growing concern in the EU in recent years. This was particularly the case after tests conducted in several Member States (MS) confirmed the presence of differences in composition of some branded food products sold across different Member States. This report aims to contribute to the existing studies by verifying whether the presence of DC-SIP influences consumer preferences and willingness…
In the study, the effectiveness of four reminder messages was evaluated through an online laboratory experiment involving 2,963 participants. The content of these messages was designed based on evidence from behavioural sciences, and their effect was contrasted with that of a simple, brief, and direct message (control message). The impact of the reminders was measured through four outcome variables: the action participants declared they would take after receiving the message, understanding and…