Linked from
The 10 pages that link to Subgame perfect equilibrium, each with the reason it gives.
Game theoryRelated: It rules out noncredible threats in sequential interactions.
Game treeRelated: Game trees identify the subgames in which this equilibrium condition must hold.
Extensive-form gameRelated: It rules out plans relying on noncredible threats in later branches.
Folk theoremRelated: Many folk theorems establish sustainable outcomes using this refinement.
Game (game theory)Related: It rules out plans that rely on noncredible threats in sequential play.