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Importance of positive feedbacks and overconfidence in a self-fulfilling Ising model of financial markets

Sornette, Didier; Zhou, Wei-Xing - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 2, pp. 704-726

Following a long tradition of physicists who have noticed that the Ising model provides a general background to build realistic models of social interactions, we study a model of financial price dynamics resulting from the collective aggregate decisions of agents. This model incorporates...

Persistent link: https://www.econbiz.de/10010873604

Behavioural breaks in the heterogeneous agent model: The impact of herding, overconfidence, and market sentiment

Kukacka, Jiri; Barunik, Jozef - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 23, pp. 5920-5938

, overconfidence, and market sentiment. We show that these behavioural breaks can be well modelled via the Heterogeneous Agent Model …

Persistent link: https://www.econbiz.de/10010703190

Statistical analysis on the evolution of OpenStreetMap road networks in Beijing

Zhao, Pengxiang; Jia, Tao; Qin, Kun; Shan, Jie; Jiao, … - In: Physica A: Statistical Mechanics and its Applications 420 (2015) C, pp. 59-72

evolution of OSM road networks in Beijing, China, from four aspects. First, findings from general analysis indicate that (1) the … indicate that (5) OSM road networks resemble the growth of real road networks and are undergoing an evolution process depicted … evolution process of continuous strong exploration accompanied by weak densification. …

Persistent link: https://www.econbiz.de/10011117885

Analyzing the structure of earthquake network by k-core decomposition

He, Xuan; Zhao, Hai; Cai, Wei; Li, Guang-Guang; Pei, … - In: Physica A: Statistical Mechanics and its Applications 421 (2015) C, pp. 34-43

of earthquake networks. On observation of the evolution of the maximum coreness, it is found that it has some sudden …

Persistent link: https://www.econbiz.de/10011194069

Computer simulation of arising of diploid genomes

Tretyakov, Victor S.; Tretyakov, Nikolay P. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 16, pp. 4215-4222

The haploid–diploid cycle where, under unfavorable conditions the population becomes diploid, is modeled by a Monte-Carlo method in the framework of the Jan–Stauffer–Moseley hypothesis. Diploidy and sex may have first arisen as a way to escape death, when a simple unicellular individual is...

Persistent link: https://www.econbiz.de/10010872040

Protein folding as an evolutionary process

Sharma, Vivek; Kaila, Ville R.I.; Annila, Arto - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 6, pp. 851-862

surrounding density-in-energy. Evolution toward more probable states, eventually attaining the stationary state, naturally selects …

Persistent link: https://www.econbiz.de/10010872071

Evolutionary computer simulations

Oliveira, Paulo Murilo Castro de - In: Physica A: Statistical Mechanics and its Applications 306 (2002) C, pp. 351-358

during the process, in order to study its long-term consequences. Second, evolution necessarily follows a critical dynamics …

Persistent link: https://www.econbiz.de/10010872083

A nice wrong model for the evolution of DNA base frequencies

Lobry, J.R - In: Physica A: Statistical Mechanics and its Applications 273 (1999) 1, pp. 99-102

Assuming that the evolution of DNA bases frequencies is governed by a symmetric process with respect to the two DNA …

Persistent link: https://www.econbiz.de/10010872789

Self organization in a minority game: the rôle of memory and a probabilistic approach

Burgos, E; Ceva, Horacio - In: Physica A: Statistical Mechanics and its Applications 284 (2000) 1, pp. 489-495

A minority game whose strategies are given by probabilities p, is replaced by a ‘simplified’ version that makes no use of memories at all. Numerical results show that the corresponding distribution functions are indistinguishable. A related approach, using a random walk formulation, allows...

Persistent link: https://www.econbiz.de/10010873280

Bit-string models for parasex

Moss de Oliveira, S; de Oliveira, P.M.C; Stauffer, D - In: Physica A: Statistical Mechanics and its Applications 322 (2003) C, pp. 521-530

We present different bit-string models of haploid asexual populations in which individuals may exchange part of their genome with other individuals (parasex) according to a given probability. We study the advantages of this parasex concerning population sizes, genetic fitness and diversity. We...

Persistent link: https://www.econbiz.de/10010874158