Extensive-form game

An extensive-form game is a specification of a game in game theory.

Description

Extensive-form games allow explicit representations of a number of important aspects, including:

• The sequencing of players' possible moves
• Their choices at every decision point
• The (possibly imperfect) information each player has about the other player's moves when he makes a decision
• His payoffs for all possible game outcomes.

Extensive-form games also allow representation of incomplete information in the form of chance events encoded as "moves by nature".

Sequential games

Extensive-form games are usually used for sequential games, since extensive-form games explicitly illustrate the sequential aspects of a game.

See also

• Axiom of determinacy
• Combinatorial game theory
• Game theory
• Incomplete information
• Move by nature
• Self-confirming equilibrium
• Sequential game
• Signalling
• Solution concept

External links

• Extensive-form game @ Wikipedia