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(DP 2016-08) Common Belief Revisited

UPSE Discussion Papers

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Title (DP 2016-08) Common Belief Revisited
 
Creator Balanquit, Romeo Matthew
 
Subject common p-belief; common knowledge assumption; global games
 
Description This study presents how selection of equilibrium in a game with many equilibria can be made possible when the common knowledge assumption (CKA) is replaced by the notion of common belief. Essentially, this idea of pinning down an equilibrium by weakening the CKA is the central feature of the global game approach which introduces a natural perturbation on games with complete information. We argue that since common belief is another form of departure from the CKA, it can also obtain the results attained by the global game framework in terms of selecting an equilibrium. We provide here necessary and sufficient conditions.Following the program of weakening the CKA, we weaken the notion of common belief further to provide a less stringent and a more natural way of believing an event. We call this belief process as iterated quasi-common p-belief which is a generalization to many players of a two-person iterated p-belief. It is shown that this converges with the standard notion of common p-belief at a sufficiently large number of players. Moreover, the agreeing to disagree result in the case of beliefs (Monderer & Samet, 1989 and Neeman, 1996a) can also be given a generalized form, parameterized by the number of players.JEL Classification: D83, C70 
 
Publisher UPSE Discussion Papers
 
Contributor
 
Date 2016-08-18
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://www.econ.upd.edu.ph/dp/index.php/dp/article/view/1495
 
Source UPSE Discussion Papers; 2016 Discussion Papers
 
Language eng
 
Relation http://www.econ.upd.edu.ph/dp/index.php/dp/article/view/1495/978