Working Paper, School of Economics and Finance, Queen Mary, University of London 726
We provide a new proof of the non-emptiness of approximate cores of games with many players of a finite number of types. Earlier papers in the literature proceed by showing that, for games with many players, equal-treatment cores of their "balanced cover games", which are non-empty, can be approximated by equal-treatment e-cores of the games themselves. Our proof is novel in that we rely on a fixed point theorem.
NTU games Core Approximate cores Small group effectiveness Coalition formation Payoff dependent balancedness