Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We provide a game form which undertakes a public project exactly when the total benefit of the project to individuals in a society outweights its cost. The game form is simple, balanced, and individually rational. It can be adjusted to distribute cost according to a wide class of rules. For example it can distribute cost so that each individual pays a share of the cost which is proportional to his or her benefit. We discuss the informational limitations of our work and the relation of this work to the literature on mechanism design and public goods.