THE EUROPEAN PHYSICAL JOURNAL B Opinion dynamics on directed small-world networks

In this paper, we investigate the self-affirmation effect on formation of public opinion in a directed small-world social network. The system presents a non-equilibrium phase transition from a consensus state to a disordered state with coexistence of opinions. The dynamical behaviors are very sensitive to the density of long-range-directed interactions and the strength of self-affirmation. When the long-rangedirected interactions are sparse and individual generally does not insist on his/her opinion, the system will display a continuous phase transition, in the opposite case with strong self-affirmation and dense longrange-directed interactions, the system does not display a phase transition. Between those two extreme cases, the system undergoes a discontinuous phase transition. PACS. 89.75.-k Complex systems – 89.65.-s Social and economic systems – 05.70.Fh Phase transitions: general studies – 05.50.+q Lattice theory and statistics (Ising, Potts, etc.)