Micro-bias and macro-performance

Details Micro-bias and macro-performance Micro-bias and macro-performance

2009-08-28

arxiv.org/abs/0908.4261v1

S. M.D. Seaver, A. A. Moreira, M. Sales-Pardo, R. D. Malmgren, D. Diermeier and L. A.N. Amaral Eur. Phys. J. B 67 (3) 369-375

Physics

Physics and Society

11 pages, 5 figures

Scientific paper

10.1140/epjb/e2008-00406-4

We use agent-based modeling to investigate the effect of conservatism and partisanship on the efficiency with which large populations solve the density classification task--a paradigmatic problem for information aggregation and consensus building. We find that conservative agents enhance the populations' ability to efficiently solve the density classification task despite large levels of noise in the system. In contrast, we find that the presence of even a small fraction of partisans holding the minority position will result in deadlock or a consensus on an incorrect answer. Our results provide a possible explanation for the emergence of conservatism and suggest that even low levels of partisanship can lead to significant social costs.

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