Behavioural spillovers unpacked: estimating the side effects of social norm nudges

Finally, we acknowledge support in publishing this paper from the Grantham Foundation for the Protection of the Environment and the Economic and Social Research Council through the Centre for Climate Change Economics and Policy aDepartment of Geography and Environment, London School of Economics, London. [...] The first is through the effect of the behaviour targeted by the policy on the non-targeted behaviour, which we refer to as a ”be- havioural spillover”. [...] About 98.28% of the inference sample has passed an attention check placed at the beginning of the survey,15 and 99.75% of the screened sample has passed a focus check we placed after the pre-treatment questionnaire.16 Furthermore, 81.69% of the 14Respondents are offered to give to the following charities: World Wide Fund (WWF), Friends of the Earth, Carbon Fund, Campaign against Climate Change, Th. [...] Coefficients labelled Trying correspond to the difference between the control units in the trying sample with the control units in the unwilling sample, the baseline. [...] Coefficients labelled Trying correspond to the difference between the control units in the trying sample with the control units in the unwilling sample, the baseline.