Pittarello, Andrea 'Three is better than two': Increasing donations with the attraction effect. [electronic resource] - British journal of psychology (London, England : 1953) Nov 2020 - 805-822 p. digital Publication Type: Journal Article ISSN: 2044-8295 Standard No.: 10.1111/bjop.12428 doi Subjects--Topical Terms: BeneficenceCharitiesHelping BehaviorHumans