Iterated Weaker-than-Weak Dominance

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Iterated Weaker-than-Weak Dominance
We introduce a weakening of standard gametheoretic dominance conditions, called δdominance, which enables more aggressive pruning of candidate strategies at the cost of solution accuracy. Equilibria of a game obtained by eliminating a δ-dominated strategy are guaranteed to be approximate equilibria of the original game, with degree of approximation bounded by the dominance parameter, δ. We can apply elimination of δ-dominated strategies iteratively, but the δ for which a strategy may be eliminated depends on prior eliminations. We discuss implications of this order independence, and propose greedy heuristics for determining a sequence of eliminations to reduce the game as far as possible while keeping down costs. A case study analysis of an empirical 2-player game serves to illustrate the technique, and demonstrate the utility of weaker-than-weak dominance pruning.
Shih-Fen Cheng, Michael P. Wellman
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2007
Authors Shih-Fen Cheng, Michael P. Wellman
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