Anti-Sharing may solve the sharing problem of teams: the team members promise a fixed payment to the Anti-Sharer. He collects the actual output and pays out its value to them. We prove that the internal Anti- Sharer is unproductive in equilibrium.

Many Americans donate little or nothing to charity, but according to Robert Cooter and Brian Broughman, our social environment is the cause, not human nature. They propose a small policy change to increase transparency and elicit generosity inspired by experimental evidence about the nature of...