This paper presents a proof for existence and uniqueness of a Nash equilibrium of a public good model that exploits a simple contraction mapping. The proof establishes both existence and uniqueness in a single exercise that provides intuition about sufficiency. The method of proof is applied not...

This paper analyzes nonmarket institutional structure in which policymakers from two or more governments negotiate to commonly provide a pure public good or to internalize an externality. Various equilibrium notions for the linkage are examined, including Nash, non-Nash, and Pareto. The...