Disentangling the motivational drivers of individuals is frequently regarded a key step in reconciling theory and empirical evidence on the voluntary provision of public goods. We present results of a large online field experiments with 12,624 contribution choices by members of the...

We conduct a large-scale field experiment with 2,440 subjects in which we exogenously vary the price of contributing to the closest empirical counterpart of an infinitely large public good, climate change mitigation. We find that the price effect is robust and negative, but quantitatively weak,...

In the climate policy debate, a rhetoric has evolved that attributes a high potential to "voluntary climate action". We turn to the population of Germany, the fourth largest cumulative GHG emitter, to obtain an Internet-)representative estimate of the individual willingness to abate one ton of...