@article {660,
	title = {Testing Enforcement Strategies in the Field: Threat, Moral Appeal and Social Information},
	journal = {Journal of the European Economic Association},
	volume = {11},
	year = {2013},
	pages = {634-660},
	author = {Fellner, Gerlinde and Sausgruber, Rupert and Traxler, Christian}
}
