Religion and Public Goods Provision: Experimental and Interview Evidence from Catholicism and Islam in Europe

Religions such as Catholicism and Islam are generators of substantial amounts of charitable donations and volunteer work, and they sustain themselves as organizations. How do they produce charitable public goods and their own religious club goods when they are open to extensive free-riding? We argue that mainstream religions facilitate club and public goods provision by using their community structures and theological belief systems to activate members' prosocial tendencies. The study is based on experiments with over 800 Catholics and Muslims in Dublin and Istanbul and on semi-structured interviews with over 200 Catholics and Muslims in Dublin, Istanbul, Milan, and Paris. The article also demonstrates the methodological advantages of combining field experiments with case study-based interviews.