Meet, Discuss and Trust each other: large versus small groups
  In this paper we propose a dynamical interpretation of the sociological distinction between large and small groups of interacting individuals. In the former case individual behaviors are largely dominated by the group effect, while in the latter mutual relationships do matter. Numerical and analytical tools are combined to substantiate our claims. 
Timoteo Carletti, Duccio Fanelli, Alessio Guarino, Andrea Guazzini