[Revised entry by Eric Pacuit and Olivier Roy on June 27, 2025.
Changes to: Main text, Bibliography, notes.html, supplement.html]
Non-cooperative game theory studies how individual players, or agents, make decisions in situations involving strategic interaction. In these situations, each player’s outcome depends not only on their own choices but also on the choices of the other players (see Ross 1997 [2024] for an overview). Epistemic game theory investigates how assumptions about the players’ beliefs and rationality influence their choices in strategic situations. This entry begins by discussing the role of uncertainty in strategic situations. It then introduces…

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