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Author: Nabil I. Al-Najjar
Publisher:
ISBN:
Category : Equilibrium (Economics)
Languages : en
Pages : 52
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Author: Nabil I. Al-Najjar
Publisher:
ISBN:
Category : Equilibrium (Economics)
Languages : en
Pages : 52
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Book Description
Author: Brian John Crone
Publisher:
ISBN:
Category :
Languages : en
Pages : 212
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Author: Yaron Azrieli
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
We consider games with incomplete information a la Harsanyi, where the payoff of a player depends on an unknown state of nature as well as on the profile of chosen actions. As opposed to the standard model, players' preferences over state--contingent utility vectors are represented by arbitrary functionals. The definitions of Nash and Bayes equilibria naturally extend to this generalized setting. We characterize equilibrium existence in terms of the preferences of the participating players. It turns out that, given continuity and monotonicity of the preferences, equilibrium exists in every game if and only if all players are averse to uncertainty (i.e., all the functionals are quasi--concave). We further show that if the functionals are either homogeneous or translation invariant then equilibrium existence is equivalent to concavity of the functionals.
Author: Robert J. Aumann
Publisher: MIT Press
ISBN: 9780262011471
Category : Business & Economics
Languages : en
Pages : 372
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The basic model studied throughout the book is one in which players ignorant about the game being played must learn what they can from the actions of the others.
Author: Idione Meneghel
Publisher:
ISBN:
Category : Game theory
Languages : en
Pages : 35
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Book Description
"The question of existence of a Nash equilibrium is one of the most important questions in game theory. This thesis aims to advance our understanding of the question in two broad directions: 1) by providing weaker sets of sufficient conditions; and 2) by introducing novel techniques, which allow for straightforward proofs and results that give new economic insights. Discontinuous games: This project considers the existence problem in games in which strategy sets are compact and convex, but preferences of the players are represented by numerical functions that may not be continuous. One way to show existence of equilibrium in such games is to apply the 'better reply security' logic, introduced by Reny (1999), combined with some form of quasiconcavity of utility functions. As long as players have securing strategies that are robust to other players' small deviations, one can show that the game has an equilibrium. The novelty of the techniques used relies in combining three main ideas: 1) a local continuous selection of each player's strict upper contour set; 2) the idea of activating different players locally; and 3) a weak notion of convexity of preferences. Bayesian games: Games of incomplete information have been shown to apply to a huge variety of economic, political and other social interactions. Still, the question of existence of equilibria in such games has been largely dealt with on a case-by-case basis. That is, given a particular game with incomplete information, one has to find the equilibrium to prove that it exists. The reason is that the usual tools to prove existence (continuous and quasiconcave payoffs defined on convex and compact strategy sets) do not apply to the general framework of games with incomplete information. This project investigates sufficient conditions for the existence of pure-strategy Nash equilibrium in games of incomplete information. The assumption of nonatomicity of the distribution of types allows for an analysis that does not require convexity assumptions on action spaces and/or payoff functions"--Pages iv-v.
Author: Andrés Perea
Publisher: Cambridge University Press
ISBN: 1107008913
Category : Business & Economics
Languages : en
Pages : 581
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Book Description
The first textbook to explain the principles of epistemic game theory.
Author: Helmut Meister
Publisher: Springer Science & Business Media
ISBN: 3642502784
Category : Business & Economics
Languages : en
Pages : 127
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Book Description
The approach presented in this book combines two aspects of generalizations of the noncooperative game as developed by Nash. First, players choose their acts dependent on certain information variables, and second there are constraints on the sets of decisions for players. After the derivation of a general (Nash)equilibrium existence theorem, some results from purification theory are used to prove the existence of an approximate equilibrium in pure strategies, that is in nonrandomized decision functions. For some types of payoff-functions and constraints, these games prove to have an (exact) equilibrium in pure strategies. The reason for considering constrained games with incomplete information is that, apart from their game-theoretic importance, they have rather widespread application. Market games with a continuum of traders as well as some statistical decision problems are covered with this approach.
Author: Guilherme Carmona
Publisher: World Scientific
ISBN: 9814390658
Category : Business & Economics
Languages : en
Pages : 153
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Book Description
The book aims at describing the recent developments in the existence and stability of Nash equilibrium. The two topics are central to game theory and economics and have been extensively researched. Recent results on existence and stability of Nash equilibrium are scattered and the relationship between them has not been explained clearly. The book will make these results easily accessible and understandable to researchers in the field. Book jacket.
Author: Robert R. Routledge
Publisher:
ISBN:
Category :
Languages : en
Pages : 125
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Book Description
Author: Erik Jan Balder
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
