McLennan and Tourky
Games and Economic Behavior Volume 68, Issue 2, March 2010, Pages 683–688
Publication year: 2010

We give simple proofs of refinements of the complexity results of Gilboa and Zemel (1989), and we derive additional results of this sort. Our constructions employ imitation games, which are two person games in which both players have the same sets of pure strategies and the second player wishes to play the same pure strategy as the first player.