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Lewis signaling game : ウィキペディア英語版 | Lewis signaling game
In game theory, the Lewis signaling game is a type of signaling game that features perfect common interest between players. It is named for the philosopher David Lewis who was the first to discuss this game in his Ph.D. dissertation, and later book, ''Convention''.〔Lewis, D.: 1969, ''Convention. A Philosophical Study'', Harvard University Press, Harvard, Mass.〕 ==The game==
The underlying game has two players, the ''sender'' and the ''receiver''. The world can be in any of a number of states and the sender is aware of that state. The sender has at his disposal a fixed set of ''signals'' that he can send to the receiver. The receiver can observe the signal sent, but not the state of the world, and must take some action. For each state, there is a unique correct action and both the sender and receiver prefer that the receiver take the correct action in every state. Because both the sender and receiver prefer the same outcomes as one another, this game is a game of pure common interest. The simplest version of this game (pictured above) has two states, two signals, and two acts.
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