The Emergence of Leadership in Social Networks
  We study a networked version of the minority game in which agents can choose to follow the choices made by a neighbouring agent in a social network. We show that for a wide variety of networks a leadership structure always emerges, with most agents following the choice made by a few agents. We find a suitable parameterisation which highlights the universal aspects of the behaviour and which also indicates where results depend on the type of social network. 
T. Clemson, T. S. Evans
physics.soc-ph cs.SI q-fin.GN