“…There, personalized messages -and sometimes physical letters -are being sent with the intent to achieve behavior change in the forms of increasing tax compliance, charitable giving, primary school enrollment, and student learning, or in the form of decreasing energy consumption, student absenteeism from school, credit card debt, and even the spread of HIV infections, among other examples (Reinikka and Svensson, 2005;Dupas, 2011;Luttmer and Singhal, 2014;Boyer et al, 2016;Brandon et al, 2017;Rogers and Feller, 2018;Bursztyn et al, 2019). In existing literature, such information-only interventions indicate mixed results, with some studies demonstrating success (Hallsworth et al, 2017;Hernandez et al, 2017;Bott et al, 2019) while others either fail to detect a significant effect (Blumenthal et al, 2001;Fellner et al, 2013;Castro and Scartascini, 2015;Kettle et al, 2017;Cranor et al, 2018;Dunning et al, 2019) or indicate that interventions may backfire (John and Blume, 2018;Bicchieri et al, 2019c).…”