Claudio J. Tessone
Opinion Spreading and Neighbourhood Models
Social systems are composed by a finite number of constituents. This happens to be a crucial difference to what is usually studied in Statistical Physics, namely: the infinite size (thermodynamic) limit. In this presentation, we will first show some non-trivial effects of system size in models inspired on social sciences. As an example, we will
Later, we will introduce the "Neighbourhood Models" that interpolate between nearest-neighbour and all-to-all interactions. Further, this interaction makes possible to study the spatial effects on the system. We will present, then, the results that appear in the Galam's model for minority opinion spreading under this approach. The basic ingredient in this model is the existence of a bias in the society such that one of
 C.J. Tessone, R. Toral, P. Amengual, H.S. Wio, and M. San Miguel. Eur. Phys. Jour. "B" Vol. 39, 535 (2004).
 C.J. Tessone and R. Toral. Physica "A", Vol. 351, 105 (2005).
 R. Toral and C.J. Tessone. To appear in Comm. in Computational Physics (2006).
When? Wednesday, September 6, 2006, 10.30-12.30