Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-05-04
Phys. Rev. E 80, 021119 (2009)
Physics
Condensed Matter
Statistical Mechanics
19 pages with 8 figures. Submitted to Physical Review E
Scientific paper
10.1103/PhysRevE.80.021119
In the last decade the Sznajd Model has been successfully employed in modeling some properties and scale features of both proportional and majority elections. We propose a new version of the Sznajd model with a generalized bounded confidence rule - a rule that limits the convincing capability of agents and that is essential to allow coexistence of opinions in the stationary state. With an appropriate choice of parameters it can be reduced to previous models. We solved this new model both in a mean-field approach (for an arbitrary number of opinions) and numerically in a Barabasi-Albert network (for three and four opinions), studying the transient and the possible stationary states. We built the phase portrait for the special cases of three and four opinions, defining the attractors and their basins of attraction. Through this analysis, we were able to understand and explain discrepancies between mean-field and simulation results obtained in previous works for the usual Sznajd Model with bounded confidence and three opinions. Both the dynamical system approach and our generalized bounded confidence rule are quite general and we think it can be useful to the understanding of other similar models.
Prado Carmen P. C.
Timpanaro André M.
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