Naslov
Restrictions of direct reciprocity and the necessity of gossip in large groups

Autori
Hižak, Jurica ; Gotal Dmitrović, Lovorka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
Cambridge Summit

Mjesto i datum
Cambridge, UK, 04.01.2018. - 06.01.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
cooperation ; Dunbar’s correlation ; direct reciprocity ; indirect reciprocity ; reputation ; gossip

Sažetak
In this paper, we propose a realistic subtype of tit-for-tat player with a limited memory capacity and with a gradual memory decay. Moreover, the player pays the price proportional to his memory capacity. Using the computer simulations we have shown that the optimal memory capacity for handling the exploiters grows with the group size in a similar way as the relative size of the neocortex grows with the group size of the primates as it was found by Robin Dunbar. The time required for reaching the relative fitness of the defectors asymptotically increases with the group size which points to the conclusion that there is an upper group size limit over which the mechanism of direct reciprocity is insufficient to maintain the cooperation. It seems that above the upper limit it is necessary to allow the horizontal transmission of the information about the free-riders present in the population.

Izvorni jezik
Engleski

Znanstvena područja
Matematika, Interdisciplinarne prirodne znanosti, Informacijske i komunikacijske znanosti, Interdisciplinarne društvene znanosti, Etnologija i antropologija

POVEZANOST RADA