Symbiosis in the Bak–Sneppen model for biological evolution with economic applications

In the present work we extend the Bak–Sneppen model for biological evolution by introducing local interactions between species. This “environmental” perturbation modifies the intrinsic fitness of each element of the ecology, leading to higher survival probability, even for the less fit. While the sy...

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Bibliographic Details
Published in:Physica A 2006-06, Vol.365 (2), p.499-508
Main Authors: Bartolozzi, M., Leinweber, D.B., Thomas, A.W.
Format: Article
Language:English
Subjects:
Complex systems
Econophysics
Evolution/extinction
Self-organized criticality
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Summary:In the present work we extend the Bak–Sneppen model for biological evolution by introducing local interactions between species. This “environmental” perturbation modifies the intrinsic fitness of each element of the ecology, leading to higher survival probability, even for the less fit. While the system still self-organizes toward a critical state, the distribution of fitness broadens, losing the classical step-function shape. A possible application in economics is discussed, where firms are represented as evolving species linked by mutual interests.
ISSN:0378-4371
1873-2119
DOI:10.1016/j.physa.2005.09.061