Autori
Mahmoodi, KoroshGrigolini, PaoloTitolo
Social benefits of criticality-induced psychological rewardPeriodico
Annali del Dipartimento di metodi e modelli per l'economia, il territorio e la finanzaAnno:
2015 - Volume:
16 - Pagina iniziale:
113 - Pagina finale:
126This article deals with the issue of evolutionary game theory by adopting
the key ingredient of criticality borrowed from the field of phase transitions
to establish the social benefit of altruism. The theoretical perspective that we
propose rests on the dynamics of a Nash system modulated by the behavioral
dynamics of the units of this system. The players of the network under study are
naturally led to make the selfishness choice, but due to the imitation principle
they may also make the altruism choice if some of their neighbors are altruist.
We prove that if the imitation strength K is assigned a special value Kc a phase
transition occurs to the emergence of altruism. This form of phase transition is
similar to the phase transition processes of physics but it is significantly extended,
due to the fact that the sociological system does not fit the thermodynamic
limit condition. As a consequence at criticality the concentration of altruists is
characterized by large fluctuations that have the effects of significantly enhancing
the financial benefits generated by the psychological reward for altruism
recently introduced by Gintis for a modified version of Nash game theory. We
argue that the feedback of the financial level on the behavioral level will
SICI: 2385-0825(2015)16<113:SBOCPR>2.0.ZU;2-7
Testo completo:
https://web.uniroma1.it/memotef/sites/default/files/KoroshMahmoodi_PaoloGrigolini_113-126_2015.pdfEsportazione dati in Refworks (solo per utenti abilitati)
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