Anarchy, defined as a system in which participants can seize and defend resources without regulation from above, is not chaos but rather a spontaneous order. However, anarchy is fragile and may dissolve either into formless 'amorphy' or into a more organized system such as hierarchy. Under...

In the supply of public goods, far less free riding actually occurs than traditional theory predicts. As one explanation, the social composition function, which aggregates individual contributions into an available social total, may not always take the standard summation form. Theoretical...