This paper provides necessary and sufficient conditions for a social choice correspondence to be implementable via epsilon-Nash equilibrium when agents' preferences can be represented by cardinal utilities. Our results also display robustness of Maskin's seminal result on Nash implementation.

This paper analyzes optimal contracts in a linear hidden-action model with normally distributed returns possessing two moments that are governed jointly by two agents who have negative exponential utilities. They can observe and verify each others' effort levels and draft enforceable...