Giving has been shown by many studies to be a social phenomenon. However, while people may desire to conform to the donation of others, it is unclear how fundraisers should take advantage of this. In this paper we conduct a field experiment in a workplace, in which employees are sent prominent...

Costly signalling of commitment to a group has been proposed as an explanation for participation in religion and ritual. But if the signal’s cost is too small, freeriders will send the signal and behave selfishly later. Effective signalling may then be prohibitively costly. If the average...