Sociophysics: A Review of Galam Models

Galam, Serge

doi:10.1142/s0129183108012297

Cited by 513 publications

(456 citation statements)

References 44 publications

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“…In the order to achieve his goal he used 44 (LS) Archimedean lattice. However, also with the aim of improve this criterion other researchers studied MVM on several other topologies that are not Archimedeans [39,[43][44][45][46][47][48]. To their surprise all results obtained for the critical exponents are different from results obtained by M. J. Oliveira, and are also different for each topology used.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Tax Evasion Dynamics via Majority-Vote Model on Various Topologies

Lima¹

2012

TEL

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Within the context of agent-based Monte-Carlo simulations, we study the well-known majority-vote model (MVM) with noise applied to tax evasion on simple square lattices (LS), Honisch-Stauffer (SH), directed and undirected Barabasi-Albert (BAD, BAU) networks. In to control the fluctuations for tax evasion in the economics model proposed by Zaklan, MVM is applied in the neighborhood of the noise critical qc to evolve the Zaklan model. The Zaklan model had been studied recently using the equilibrium Ising model. Here we show that the Zaklan model is robust because this can be studied using equilibrium dynamics of Ising model also through the nonequilibrium MVM and on various topologies cited above giving the same behavior regardless of dynamic or topology used here.

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Section: Introductionmentioning

confidence: 99%

Controlling the Tax Evasion Dynamics via Majority-Vote Model on Various Topologies

Lima¹

2012

TEL

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“…At odd with such innovative prevailing views, we present a model inspired from sociophysics [14,15,16,17,18], which produces bubbles as equilibrium states of a given market and crashes as the emergence of a new equilibrium. The model is rooted in neoclassical economy combined with the Galam model of opinion dynamics as the underline mechanisms leading to the step by step aggregation of individual choices towards the final collective equilibrium state.…”

Section: The Invisible Hand and The Rational Agentmentioning

confidence: 99%

“…It does not aim at an exact description of the reality but at singling out some basic mechanics which may be rather counter intuitive. Initiated more 33 years ago [21,22], it has started to become a main stream of research only in the last decade [14,15,16,17,18].…”

Section: Model and Main Hypothesizesmentioning

confidence: 99%

The Invisible Hand and the Rational Agent are Behind Bubbles and Crashes

Galam

2016

SSRN Journal

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The substantial turmoil created by both 2000 dot-com crash and 2008 subprime crisis has fueled the belief that the two classical paradigms of economics, which are the invisible hand and the rational agent, are not appropriate to describe market dynamics and should be abandoned at the benefit of alternative new theoretical concepts. At odd with such a view, using a simple model of choice dynamics from sociophysics, the invisible hand and the rational agent paradigms are given a new legitimacy. Indeed, it is sufficient to introduce the holding of a few intermediate mini market aggregations by agents sharing their own private information, to recenter the invisible hand and the rational agent at the heart of market self regulation including the making of bubbles and their subsequent crashes. In so doing, an elasticity is discovered in the market efficiency mechanism due to the existence of agents anticipation. This elasticity is found to create spontaneous bubbles, which are rationally founded, and at the same time, it provokes crashes when the limit of elasticity is reached. Although the findings disclose a path to put an end to the bubble-crash phenomena, it is argued to be rationality not feasible.

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“…This section briefly reviews Galam's model in [5], [6], along with some of its features. In order to introduce the latter model we preliminarily consider the following process.…”

Section: The Original Galam's Modelmentioning

confidence: 99%

A New Model for Estimating the Probability of Information Spreading with Opinion Leaders

2011

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Abstract.In this paper we analyze some issues related to the general problem of information spreading among individuals, where suitable assumptions on the information exchange are considered. In particular, starting from the scheme proposed in [5], which is based on a majority rule to treat the individuals' interaction, we define and introduce special individuals who play a key role in the information spreading. The latter will be addressed as opinion leaders, and have the special feature of strongly interfering with the process based on the majority rule. We consider a new model, where opinion leaders are introduced as special agents, and study its specific properties which significantly recast some conclusions worth for the model in [5]. Finally, we provide some results cocerning the dynamics of the model.

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Sociophysics: A Review of Galam Models

Cited by 513 publications

References 44 publications

Controlling the Tax Evasion Dynamics via Majority-Vote Model on Various Topologies

Controlling the Tax Evasion Dynamics via Majority-Vote Model on Various Topologies

The Invisible Hand and the Rational Agent are Behind Bubbles and Crashes

A New Model for Estimating the Probability of Information Spreading with Opinion Leaders

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