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Phys. Rev. Lett. 88, 238702 (2002) [4 pages]

Self-Segregation versus Clustering in the Evolutionary Minority Game

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Shahar Hod1 and Ehud Nakar2
1Department of Condensed Matter Physics, Weizmann Institute, Rehovot 76100, Israel
2The Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel

Received 26 December 2001; published 23 May 2002

Complex adaptive systems have been the subject of much recent attention. It is by now well established that members (“agents”) tend to self-segregate into opposing groups characterized by extreme behavior. However, the study of such adaptive systems has mostly been restricted to simple situations in which the prize-to-fine ratio R equals unity. In this Letter we explore the dynamics of evolving populations with various different values of the ratio R, and demonstrate that extreme behavior is in fact not a generic feature of adaptive systems. In particular, we show that “confusion” and “indecisiveness” take over in times of depression, in which case cautious agents perform better than extreme ones.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.238702
DOI:
10.1103/PhysRevLett.88.238702
PACS:
02.50.Le, 87.23.Kg, 89.65.Ef

See Also

Reply: E. Burgos, Horacio Ceva, and R. P. Perazzo, Comment on “Self-Segregation versus Clustering in the Evolutionary Minority Game”, Phys. Rev. Lett. 91, 189801 (2003).

Reply: Shahar Hod and Ehud Nakar, Hod and Nakar Reply:, Phys. Rev. Lett. 91, 189802 (2003).