Alpizar, Francisco; Carlsson, Fredrik; … - In: Journal of Public Economics 92 (2008) 5-6, pp. 1047-1060
We investigate the role of anonymity, reciprocity, and conformity for voluntary contributions, based on a natural field experiment conducted at a national park in Costa Rica. Contributions made in public in front of the solicitor are 25% higher than contributions made in private. Giving subjects...