On the Channels of Pro-Social Behavior Evidence from a natural field experiment Volume 3 Jena Economic Research Papers 2009-12-14 2009 2007 2009-102 Tied versus untied transfers charitable donations charity willingness to give pro social behavior We conduct a natural field experiment on direct and indirect transfer mechanisms for small donations. Charitable contributions are significantly higher if made indirectly, i.e. if they are tied to the purchase of a good sold at a premium, than if they are made directly. Donations are significantly higher under both transfer mechanisms if people are given a suggested reference donation. jportal_jpjournal_00000016 2009-12-15T07:12:16.996Z 2010-12-17T11:54:13.441Z