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"Combinatorial Game Theory" is a branch of mathematics that is completely separate from and unrelated to "Game Theory" (counterintuitive though that may seem), and therefore it does not belong here as a subcategory!
Well, it's a bit complicated. Game theory as a normative enterprise is certainly a branch of rational choice theory. Game theory as an empirical study of animal (incl. human) behavior is similar to rational choice theory, but probably not properly a subset of rational choice theory. I don't think you'll find anyone that says rational choice theory is a subset of game theory, however; if one is contained by the other game theory is contained in rational choice theory. --best, kevin[kzollman][talk]20:19, 25 August 2007 (UTC)[reply]