We conduct an online field experiment operationalised through an online survey with around 1000 Ukrainian urban participants (mostly from Ukraine, some possibly temporarily relocated to other countries) aged 16 to 55, who were registered residents of all regions of Ukraine before the Russian invasion. Participants were randomly assigned to four treatment conditions which varied whether they were assigned a donor, and the identity of the donor. In the survey we observe their prosocial behaviour in the form of real donations to a humanitarian cause, and we also measure their preferences, reported prosocial behaviours through non-incentivised questions; we also collect individual characteristics.
We run a second wave of the online survey one year after the first survey and treatment, with the same participants ( 40% expected response rate). We collect long-term measures of prosociality, we reinforce the initial treatment (by giving the participants a reminder) and the prosocial behaviour measures from the initial survey.