Bartering Games in the Kolm Triangle

We study a public good mechanism that possesses several attractive properties. In particular, the mechanism always produces feasible allocations, induces a game where the Nash equilibria are all individually rational, and, in contrast to the voluntary contribution mechanism, supports the Lindahl allocation as a Nash equilibrium allocation. The geometric framework of the Kolm triangle is employed to illustrate the workings of the mechanism and provide intuition for the main results.