Degli Antoni, Giacomo; Grimalda, Gianluca - Econometica - 2012
. 1995). It comprises an in-group treatment, where members interact with other members of their own association, and an out …%) than non- members, both in the in-group and in the out-group treatment; this is a much higher proportion than what found by … of associations of which people are members affects the patterns of cooperation. We find in-group favoritism for members …