This paper shows that when donors and recipients care about each other --two-sided altruism -- the presence of asymmetry of information about the donor's income leads very naturally to a signaling game. A donor who cares about the recipient's welfare has incentives to appear richer than he is...

We study informal insurance within communities, explicitly recognizing the possibility that subgroups of individuals may destabilize insurance arrangements among the larger group. We therefore consider self-enforcing risk-sharing agreements that are robust not only to single-person deviations...