"Interactive Decision Theory" would perhaps be a more descriptive name for the discipline usually called Game Theory.
Robert AumannRepetition acts as an enforcement mechanism: It makes cooperation achievable when it is not achievable in the one-shot game, even when one replaces strategic equilibrium as the criterion for achievability by the more stringent requirement of perfect equilibrium.
Robert AumannThe strong equilibrium point f just described is one of "unrelenting ferocity" against offenders. It exhibits a zeal for meting out justice that is entirely oblivious to the sometimes dire consequences to oneself or to the other faitheful i.e., those who have not deviated.
Robert Aumann