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Cooperative networks overcoming defectors by social influence
Gomez Portillo, Ignacio - In: Physica A: Statistical Mechanics and its Applications 394 (2014) C, pp. 198-210
We address the cooperation problem in structured populations by considering the prisoner’s dilemma game as a metaphor of the social interactions between individuals with imitation capacity. We present a new strategy update rule called democratic weighted update where the individual’s...
Persistent link: https://www.econbiz.de/10010873822
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Social influence promotes cooperation in the public goods game
Wu, Te; Fu, Feng; Dou, Puxuan; Wang, Long - In: Physica A: Statistical Mechanics and its Applications 413 (2014) C, pp. 86-93
Previous studies mainly consider the random selection pattern in which individuals randomly choose reference models from their neighbors for strategy updating. However, the random selection pattern is unable to capture all real world circumstances. We institute a spatial model to investigate the...
Persistent link: https://www.econbiz.de/10010906950
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A novel opinion dynamics model based on expanded observation ranges and individuals’ social influences in social networks
Diao, Su-Meng; Liu, Yun; Zeng, Qing-An; Luo, Gui-Xun; … - In: Physica A: Statistical Mechanics and its Applications 415 (2014) C, pp. 220-228
In this paper, we propose an opinion dynamics model in order to investigate opinion evolution and interactions and the behavior of individuals. By introducing social influence and its feedback mechanism, the proposed model can highlight the heterogeneity of individuals and reproduce realistic...
Persistent link: https://www.econbiz.de/10010939932
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Cultural evolution: The case of babies’ first names
Xi, Ning; Zhang, Zi-Ke; Zhang, Yi-Cheng; Ge, Zehui; She, Li - In: Physica A: Statistical Mechanics and its Applications 406 (2014) C, pp. 139-144
In social sciences, there is currently rare consensus on the underlying mechanism for cultural evolution, partially due to lack of suitable data. The evolution of first names of newborn babies offers a remarkable example for such researches. In this paper, we employ the historical data on baby...
Persistent link: https://www.econbiz.de/10010871954
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The existence of negative absolute temperatures in Axelrod’s social influence model
Villegas-Febres, J.C.; Olivares-Rivas, W. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 14, pp. 3701-3707
We introduce the concept of temperature as an order parameter in the standard Axelrod’s social influence model. It is defined as the relation between suitably defined entropy and energy functions, T=(∂S/∂E)−1. We show that at the critical point, where the order/disorder transition...
Persistent link: https://www.econbiz.de/10011059238
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Social influence and the Matthew mechanism: The case of an artificial cultural market
Bask, Miia; Bask, Mikael - In: Physica A: Statistical Mechanics and its Applications 412 (2014) C, pp. 113-119
We show that the Matthew effect, or Matthew mechanism, was present in the artificial cultural market Music Lab in one-fourth of the “worlds” when social influence between individuals was allowed, whereas this effect was not present in the “world” that disallowed social influence between...
Persistent link: https://www.econbiz.de/10011062049
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The global financial crisis: Is there any contagion between real estate and equity markets?
Hui, Eddie Chi-man; Chan, Ka Kwan Kevin - In: Physica A: Statistical Mechanics and its Applications 405 (2014) C, pp. 216-225
This study examines contagion across equity and securitized real estate markets of Hong Kong, US and UK during the … the cokurtosis test to examine contagion between real estate and equity markets. The results show that the cokurtosis test … can detect additional channels of contagion, and hence is a more powerful test. In contrary to Fry et al. (2010), we find …
Persistent link: https://www.econbiz.de/10010931587
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Insolvency and contagion in the Brazilian interbank market
Souza, Sergio R.S.; Tabak, Benjamin M.; Silva, Thiago C.; … - In: Physica A: Statistical Mechanics and its Applications 431 (2015) C, pp. 140-151
This paper proposes a new way to model and analyze contagion in interbank networks. We use a unique dataset from the … Brazilian financial system and include all active financial intermediaries. We show that the contagion chain has a short … propagation path. We find that first-round contagion is generated only by banks and that medium-sized banks can generate contagion …
Persistent link: https://www.econbiz.de/10011264556
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A model of international financial crises
Kaizoji, Taisei - In: Physica A: Statistical Mechanics and its Applications 299 (2001) 1, pp. 279-293
decision behavior, and financial contagion between markets occurs as a result of attempts by traders in the domestic market to …
Persistent link: https://www.econbiz.de/10010589750
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A model for the contagion and herding
Caetano, Marco Antonio Leonel; Yoneyama, Takashi - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 23, pp. 4445-4450
This work concerns the modeling of contagion and herding effects which can cause significant movements of prices and … interacting particles is used to describe the contagion and emergence of herding behavior of financial agents leading to the …
Persistent link: https://www.econbiz.de/10010590969