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Stochastic group selection model for the evolution of altruism

Silva, Ana T.C.; Fontanari, J.F. - In: Physica A: Statistical Mechanics and its Applications 268 (1999) 1, pp. 257-268

We study numerically and analytically a stochastic group selection model in which a population of asexually reproducing individuals, each of which can be either altruist or non-altruist, is subdivided into M reproductively isolated groups (demes) of size N. The cost associated with being...

Persistent link: https://www.econbiz.de/10011059450

To cooperate or to defect? Altruism and reputation

Kułakowski, Krzysztof; Gawroński, Przemysław - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 17, pp. 3581-3584

are driven by their altruism to cooperate or not. The probability of cooperation depends also on the co …-player’s reputation. We find that players with positive altruism cooperate and meet cooperation. In this approach, payoffs are not …The basic difficulty in cooperation theory is to justify the cooperation. Here we propose a new approach, where players …

Persistent link: https://www.econbiz.de/10011062448

Dissolution of traffic jam via additional local interactions

Lee, Hyun Keun; Kim, Beom Jun - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 23, pp. 4555-4561

We use a cellular automata approach to numerically investigate traffic flow patterns on a single lane. The free-flow phase (F), the synchronized phase (S), and the jam phase (J) are observed and the transitions among them are studied as the vehicular density ρ is slowly varied. If ρ is...

Persistent link: https://www.econbiz.de/10011057897

Altruism: A natural strategy for enhancing survival

Rozenfeld, Alejandro F.; Luis Gruver, José; Albano, … - In: Physica A: Statistical Mechanics and its Applications 369 (2006) 2, pp. 817-822

We study the influence of altruistic behavior in a prey–predator model permitting the preys to commit suicide by confronting the predators instead of escaping. Surprising, altruistic behavior at microscopic (local) scale, leads to the emergence of new complex macroscopic (global) phenomena...

Persistent link: https://www.econbiz.de/10010871661

Cooperation and charity in spatial public goods game under different strategy update rules

Li, Yixiao; Jin, Xiaogang; Su, Xianchuang; Kong, Fansheng; … - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 5, pp. 1090-1098

Human cooperation can be influenced by other human behaviors and recent years have witnessed the flourishing of … studying the coevolution of cooperation and punishment, yet the common behavior of charity is seldom considered in game …-theoretical models. In this article, we investigate the coevolution of altruistic cooperation and egalitarian charity in spatial public …

Persistent link: https://www.econbiz.de/10010588646

Mutually altruistic trends in resources allocation

Vadasz, Peter - In: Physica A: Statistical Mechanics and its Applications 347 (2005) C, pp. 653-672

Solutions to a series of apparent paradoxes arising in problems dealing with resources allocation under mutually altruistic conditions are presented. In particular, Bergstrom's lovers’ dilemma (J. Econ. Perspect. 3 (1989) 165) is dealt with as an explicit example of such apparent paradoxes....

Persistent link: https://www.econbiz.de/10010590455

A social discounting model based on Tsallis’ statistics

Takahashi, Taiki - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 17, pp. 3600-3603

Social decision making (e.g. social discounting and social preferences) has been attracting attention in economics, econophysics, social physics, behavioral psychology, and neuroeconomics. This paper proposes a novel social discounting model based on the deformed algebra developed in the...

Persistent link: https://www.econbiz.de/10011060117

Emergence of scaling and assortative mixing through altruism

Li, Ping; Zhang, Jie; Small, Michael - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 11, pp. 2192-2197

Many social networks, apart from displaying scale-free characteristics observed in some instances, possess another remarkable feature that distinguishes them from those that appear in biological and technological context—assortativity. However, little or no attention has been payed to the...

Persistent link: https://www.econbiz.de/10011060444

How altruism works: An evolutionary model of supply networks

Ge, Zehui; Zhang, Zi-Ke; Lü, Linyuan; Zhou, Tao; Xi, Ning - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 3, pp. 647-655

characterize the effects of suppliers’ altruism in supply networks, and find that the performances of both suppliers and supply … chains are improved by introducing the role of altruism. Furthermore, an interesting and reasonable phenomenon is discovered … of altruism for both research and commercial applications. …

Persistent link: https://www.econbiz.de/10011063647

The distribution of wealth in the presence of altruism in simple economic models

Rodríguez-Achach, M.; Huerta-Quintanilla, R. - In: Physica A: Statistical Mechanics and its Applications 361 (2006) 1, pp. 309-318

We study the effect of altruism in two simple asset exchange models: the yard sale model (winner gets a random fraction … number of traders who behave altruistically and by the degree of altruism that they show. The resulting wealth distribution … is characterized using the Gini index. We compare the resulting values of the Gini index at different levels of altruism …

Persistent link: https://www.econbiz.de/10011063711