Evolution of tag-based cooperation on Erdős–Rényi random graphs

Lima, F. W. S.; Hadzibeganovic, Tarik; Stauffer, Dietrich

doi:10.1142/s0129183114500065

Cited by 13 publications

(7 citation statements)

References 47 publications

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“…16,17 Previously square lattices, Watts-Strogatz rewired lattices, and Erd€ os-R enyi random graphs were used. 21,22 We build on our previous model generalizations 22,23 by studying the e®ects of random network structure on the evolution of cooperative behavior of asexually reproducing agents with heritable and visually discernible tag and with four di®erent interaction strategies. More speci¯cally, agents are characterized in our model by one out of four possible arbitrary traits called tags, such as di®erent skin colors.…”

Section: Model and Simulationsmentioning

confidence: 99%

Evolution of egoism on semi-directed and undirected Barabási-Albert networks

Lima

2015

Int. J. Mod. Phys. C

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Through Monte Carlo simulations, we study the evolution of the four strategies: Ethnocentric, altruistic, egoistic and cosmopolitan in one community of individuals. Interactions and reproduction among computational agents are simulated on undirected and semi-directed Barab asi-Albert (BA) networks. We study the Hammond-Axelrod (HA) model on undirected and semidirected BA networks for the asexual reproduction case. With a small modi¯cation in the traditional HA model, our simulations showed that egoism wins, di®erently from other results found in the literature where ethnocentric strategy is common. Here, mechanisms such as reciprocity are absent.

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Section: Model and Simulationsmentioning

confidence: 99%

Evolution of egoism on semi-directed and undirected Barabási-Albert networks

Lima

2015

Int. J. Mod. Phys. C

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“…A myriad of contagion processes have been studied by epidemic models that go far beyond the scope of infectious diseases [1] and into the very diverse area of social behavior dynamics, such as corruption [2], cooperation [3], obesity [4], ideological conflicts [5], fanaticism [6], rumor spreading [7], etc. The applications for such models also include general populational behavior, such as rising (and falling) of ancient empires [8], violence [9], radicalization [10] and tax evasion dynamics [11,12], andof particular interest to this work -addiction.…”

Section: Introductionmentioning

confidence: 99%

Role of inflexible minorities in the evolution of alcohol consumption

Crokidakis,

Sigaud

2022

Preprint

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In this work we study a simple mathematical model for drinking behavior evolution. For this purpose, we considered three compartments, namely Susceptible individuals S (nonconsumers), Moderated drinkers M and Risk drinkers R. Inside the S and R compartments, we considered the presence of inflexible or zealot agents, i.e., individuals that never change their behavior (never drink or always drink a lot). These inflexible agents are described by fixed densities s I and r I , for nonconsumer inflexible and risk drinking inflexible individuals, respectively. We analyze the impact of the presence of such special agents in the evolution of drinking behavior in the population. Specifically, since the presence of inflexible agents are similar to the introduction of quenched disorder in the model, we are interested in the impact of such disorder in the critical behavior of the system. Our analytical and numerical results indicate that the presence of only one class of inflexible agents, s I or r I , destroys one of the two possible absorbing phases that are observed in the model without such inflexibles, i.e., for s i = r I = 0. In the presence of the both kinds of inflexible agents simultaneously, there are no absorbing states anymore. Since absorbing states are collective macroscopic states with the presence of only one kind of individuals in the population, nonconsumers or risk drinkers, we argue that the inclusion of inflexible agents in the population makes the model more realistic. In addition, the work makes a contribution to studies on the impact of quenched disorder in nonequilibrium phase transitions, that are a subject of interest for Nonequilibrium Statistical Physics.

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“…They use discrete variables or continuous ones. Among them, simple contagion models were considered to study the evolution of distinct social processes, like tax evasion [14], cooperation [15], rumor spreading [16], epidemic spreading [17], radicalization phenomena [18], ideological conflicts [19], corruption [20], juvenile crimes [21], obesity [22].…”

Section: Introductionmentioning

confidence: 99%

After 2018 Bolsonaro victory, is a 2022 remake feasible?

Crokidakis,

Galam

2021

Preprint

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We propose a contagion model to describe the evolution of the political voting trends in Brazil after the dictatorship from 1985 to nowadays. We consider a fully-connected population divided in two voting groups, left and right. Each group includes three kinds of agents, sensitives, inflexibles and radicals. While sensitives may shift their left or right voting, inflexibles and radicals do not. Excluding political interactions with radicals, we found sets of pair interaction parameters which reproduce all the voting outcomes of past presidential elections from 1989 till 2014 excluding 2018. At this stage, we found that adding an empty third voting group overlapping left and right, the populist voting group, can yield Bolsonaro 2018 victory. The initial filling of the populist group is triggered by the breaking of the interaction barrier between sensitives and radicals, which had prevailed for decades. Within each voting group, some of the interacting pairs sensitive/radical recast the sensitive into a populist. This status change from sensitive to populist allows the populist to interact with sensitives of both left and right, thus creating an additional source of filling of the populist group. The process is shown to yield the 2018 55% for Bolsonaro. From the 2018 distribution of votes, we evaluate the parameter changes which recover the recent 2021 poll yielding a victory of Lula against Bolsonaro at a score of 64/36. The magnitude of the parameter changes are very small highlighting the high volatility of what would be a vote under the current conditions. We also present an alternative explanation for the Bolsonaro victory in 2018 election, based on a single varying parameter without populists. The aim was to reproduce all elections outcomes (1989 -2018) and the 2021 poll. For 2018 election and 2021 poll, we compare the results of the two scenarios, with and without populists. Regarding the two possible scenarios for the 2018 Bolsonaro victory, we discuss about a hypothetic Lula/Bolsonaro 2022 second round voting and the requirements to yield either Lula or Bolsonaro victory in 2022. Both scenarios are feasible.

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Evolution of tag-based cooperation on Erdős–Rényi random graphs

Cited by 13 publications

References 47 publications

Evolution of egoism on semi-directed and undirected Barabási-Albert networks

Evolution of egoism on semi-directed and undirected Barabási-Albert networks

Role of inflexible minorities in the evolution of alcohol consumption

After 2018 Bolsonaro victory, is a 2022 remake feasible?

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