Environmentally friendly alternatives (EFA) are touted as a key component of a transition towards lowering the impact of human activity on the environment. Still, the environmental costs of these technologies are seldom null; they are simply less environmentally damaging than existing options....

Using a natural field experiment in a recreational site, a public good almost fully dependent on voluntary donations, we explored the crowding-out effect of gift rewards. First, we investigated whether receiving a map in appreciation of a donation crowded out prosocial behavior and found no...

We conducted a field experiment in a protected area to explore the effects of conformity to a social reference versus a 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...