It is known that no public goods mechanism can be Pareto efficient in Nash equilibrium, individually rational (IR), simple (using a one-dimensional message space), and dynamically stable. The Walker mechanism satisfies all but stability, while the Groves-Ledyard mechanism satisfies all but IR....

This paper presents a reconciliation of the three distinct ways in which the economic literature has defined overconfidence: (1) overestimation of one's actual performance, (2) overestimation of one's performance relative to others, and (3) overestimation of the quality of one's private signals....