Zapechelnyuk, Andriy; Ro'i Zultan - Center for the Study of Rationality, Hebrew University … - 2008
We consider a multitype population model with unobservable types, in which players are engaged in the `mutual help' game: each player can increase her partner's fitness at a cost to oneself. All individuals prefer free riding to cooperation, but some of them, helpers, can establish reciprocal...