Behavioural Insights Projects

Could we expect a higher vaccine uptake if vaccination appointments are no longer necessary? A campaign in neighbourhoods where vaccination rates were lagging sought to test whether emphasising convenience led to an increase in the number of administered vaccinations, by offering walk-in vaccination without an appointment. This indeed proved to be the case. Furthermore, getting a COVID-19 vaccine on a walk-in basis has become popular, along with the platform PrikkenZonderAfspraak. Why this…

Institution: National Institute for Public Health and the Environment (RIVM)

In an effort to boost COVID-19 vaccination rates, mobile vaccination units were rolled out in late 2021. This strategy proved successful: the number of vaccinations administered was between 1.1 and 14.5 times higher in neighbourhoods on the days they were visited by mobile units. The units were more effective in rural areas than in urban settings. In addition, they proved to be more effective than average in neighbourhoods with a higher proportion of SGP voters and still effective, although to a…

Washing your hands regularly with soap and water is an effective and easy way of reducing the risk of people falling ill with COVID-19, influenzas or a cold, or contracting other viral illnesses. Stickers and posters were developed focusing on reframing, nudging and habit stacking. Displaying the posters in the office environment led to an increase in handwashing amongst employees. Soap consumption went up. Why this experiment was conducted: improved hygiene standards in the workplace is the…

Institution: Netherlands Ministry of Justice and Security; Netherlands Ministry of Health, Welfare and Sport; and RIVM

Saving while being overdrawn costs consumers money. The interest they have to pay is far more than the interest they receive. An experiment tested two interventions aimed at encouraging consumers to use their savings to clear any overdraft, by pre-entering a repayment amount and giving explicit information about costs. These interventions lead to better choices amongst many, although not yet all, consumers. Why this experiment was conducted: saving while being overdrawn costs Dutch citizens…

Institution: Dutch Authority for the Financial Markets (AFM)

Small and Medium-sized Enterprises are particularly vulnerable to cyberattacks. A large-scale field experiment amongst SME employees showed that a phishing test is effective in the short term, but not in the medium or long term. Why this experiment was conducted: SMEs are vulnerable to cyberattacks Phishing is one of the most common types of cybercrime and is frequently the precursor to additional cyber threats, including malware and ransomware attacks. SMEs are vulnerable, with many of them…

Institution: Netherlands Regional Platform of Crime Control North-Holland and the Ministry of Economic Affairs and Climate Policy

A campaign was launched to encourage young people to get the catch-up vaccination against Human Papillomavirus (HPV). The campaign succeeded in promoting discussion and increased awareness of HPV as well as persuading young people to get vaccinated. Why this experiment was conducted: provide boys and girls with a vaccine they might not have received In 2022 and 2023, boys were invited for the first time and girls were invited again to get vaccinated against the Human Papillomavirus (HPV). HPV…

Institution: Dutch National Immunisation Programme

To reduce calf mortality rates, the Netherlands Food and Consumer Product Safety Authority (NVWA) developed various letters for distribution amongst three subgroups of dairy farmers. The impact measurement shows that calf mortality decreased in the overall target group, although the letters did not produce any measurable outcomes. Why this experiment was conducted: calf rearing necessitates a significant amount of care Failure to ensure appropriate care for animals in dairy farming operations…

Institution: Netherlands Food and Consumer Product Safety Authority

Why this experiment was conducted: scepticism about second-hand clothes The clothing industry is a major polluter, and the second-hand market is an important alternative to new clothes. While more and more Dutch consumers are turning to pre-owned clothing, a large group remains sceptical. According to a target group study conducted in 2020, they wonder whether they will be able to find a suitable second-hand item, and whether it is hygienic. The best way to overcome this scepticism is to create…

Institution: Dutch Ministry of Infrastructure and Water Management

The Municipality of Dordrecht organised a competition titled The Cleanest Neighbourhood in Dordrecht. The aim was to get residents to place less rubbish next to underground waste containers. As a result of the experiment, the amount of waste left next to bins decreased and a new social norm was established. Why this experiment was conducted: rubbish left next to waste containers Bin liners and other bags containing residual and larger waste left next to underground containers rank amongst the…

Institution: Netherlands Municipality of Dordrecht

A series of controlled randomised experiments was conducted to examine the savings effects for households of three types of energy consumption managers tools: an email + web application, an app installed on a smartphone or tablet and an in-home display. Energy savings could only be established for the in-home display: almost 7% on natural gas and over 2% on electricity consumption. Why this experiment was conducted: The Netherlands' climate targets Energy consumption by Dutch households…

Institution: PBL Netherlands Environmental Assessment Agency