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SOE: Fachverband Physik sozio-ökonomischer Systeme

SOE 20: Social Systems, Opinion and Group Dynamics III

SOE 20.3: Vortrag

Donnerstag, 29. März 2012, 14:30–14:45, H 0110

Single vs multiple source mechanisms in social diffusion — •Paula Tuzón Marco, Víctor M. Eguíluz, and Maxi San Miguel — IFISC (UIB-CSIC), Palma de Mallorca, Spain

Diffusion processes in social systems, such as rumours, fashions, innovations or opinions, are typically modeled following two different mechanisms: one based on epidemic-like spreading models and the other on threshold models. The main difference lies in the number of sources involved for an agent to adopt; while in the epidemic-like models, a single source is enough to trigger contagion, in threshold models, multiple sources are necessary to convince an individual, and the threshold refers to the number of signals that an agent has to receive to adopt. Despite the theoretical work, it is not clear which approach is closer to the empirical evidence. For instance, how the probability for a consumer to buy a new product depends on the number of neighbours buying this product? In this work, we propose a model that interpolates between single and multiple signal integration in a certain window, and explore how both mechanisms affect the adoption curve and cascades.