comparable, but imposed, suggested donation. As observed before, we see visitors conforming to the changing social reference. On … the other hand, the treatment in which we suggested a donation resulted in lower shares of visitors donating, compared to …

donation crowded out prosocial behavior and found no significant effect of giving the map. Second, we explored the effect of …

time of the donation had any behavioral effect. Our first treatment aimed at identifying peer effects, whereas our second …