The relationship between quantum and classical correlation in games

Article history: Received 22 October 2008 Available online xxxx JEL classification: C72 D80 Quantum games have been argued to differ from classical games by virtue of the quantum-mechanical phenomenon of entanglement. We formulate a baseline of classical correlation – which takes two forms according as signals added to the game are or are not required to be independent of chance moves in the underlying game. We show that independence is a necessary condition for the addition of quantum signals to have a different effect from the addition of classical signals. © 2009 Elsevier Inc. All rights reserved.