Culture-area relation in Axelrod's model for culture dissemination

Author(s)

Barbosa, Lauro A. ^[1] ; Fontanari, Jose F. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Fis, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: THEORY IN BIOSCIENCES; v. 128, n. 4, p. 205-210, NOV 2009.
• Web of Science Citations: 19

Abstract

Axelrod's model for culture dissemination offers a nontrivial answer to the question of why there is cultural diversity given that people's beliefs have a tendency to become more similar to each other's as they interact repeatedly. The answer depends on the two control parameters of the model, namely, the number F of cultural features that characterize each agent, and the number q of traits that each feature can take on, as well as on the size A of the territory or, equivalently, on the number of interacting agents. Here, we investigate the dependence of the number C of distinct coexisting cultures on the area A in Axelrod's model, the culture-area relationship, through extensive Monte Carlo simulations. We find a non-monotonous culture-area relation, for which the number of cultures decreases when the area grows beyond a certain size, provided that q is smaller than a threshold value q (c) = q (c) (F) and F a parts per thousand yen 3. In the limit of infinite area, this threshold value signals the onset of a discontinuous transition between a globalized regime marked by a uniform culture (C = 1), and a completely polarized regime where all C = q (F) possible cultures coexist. Otherwise, the culture-area relation exhibits the typical behavior of the species-area relation, i.e., a monotonically increasing curve the slope of which is steep at first and steadily levels off at some maximum diversity value. (AU)

• FAPESP's process: 04/06156-3 - Replicators: applications in pre-biotic evolution and language
• Grantee: José Fernando Fontanari
• Support Opportunities: Research Projects - Thematic Grants