I introduce an undominated coalition-proof Nash equilibrium that is unique and is able to select undominated Nash equilibria in a quasi-supermodular game with a strict single-crossing property and monotonic externalities

We examine the welfare properties, coalition-proofness and order-theoretical structure of the set of Nash equilibria in pure strategy games with a-aggregative simple strategic substitutes and monotone a-aggregative externalities. For these games, we prove the equivalence among the set of Nash...