The transition to efficiency in minority games (Articolo in rivista)

Type
Label
  • The transition to efficiency in minority games (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Galla, T; De Martino, A (2008)
    The transition to efficiency in minority games
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Galla, T; De Martino, A (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 41 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Galla, Tobias] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, England; [De Martino, Andrea] INFM, SMC, CNR, I-00185 Rome, Italy; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy (literal)
Titolo
  • The transition to efficiency in minority games (literal)
Abstract
  • The existence of a phase transition with diverging susceptibility in batch minority games (MGs) is the mark of informationally efficient regimes and is linked to the specifics of the agents' learning rules. Here, we study how the standard scenario is affected in a mixed population game in which agents with the 'optimal' learning rule (i.e. the one leading to efficiency) coexist with those whose adaptive dynamics is sub-optimal. Our generic finding is that any non-vanishing intensive fraction of optimal agents guarantees the existence of an efficient phase. Specifically, we calculate the dependence of the critical point on the fraction q of 'optimal' agents focusing our analysis on three cases: MGs with market impact correction, grand-canonical MGs and MGs with heterogeneous comfort levels. (literal)
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