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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-08-14 and was most recently seen on 2026-08-14.
In game theory, a subgame perfect equilibrium (SPE), or subgame perfect Nash equilibrium (SPNE), is a refinement of the Nash equilibrium concept, specifically designed for dynamic games where players make sequential decisions. A strategy profile is an SPE if it represents a Nash equilibrium in every possible subgame of the original game. Informally, this means that at any point in the game, the players' behavior from that point onward should represent a Nash equilibrium of the continuation game, no matter what happened before. This ensures that strategies are credible and rational throughout the entire game, eliminating non-credible threats.
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