Dynamics of contention

This paper presents a survey of research on learning with a special focus on the structure of interaction between individual entities. The structure is formally modelled as a network: the nodes of the network are individuals while the arcs admit a variety of interpretations (ranging from information channels to social and economic ties). I first examine the nature of learning about optimal actions for a given network architecture. I then discuss learning about optimal links and actions in evolving networks. Forthcoming in, Group formation in economics: networks, clubs, and coalitions edited by G. Demange and M. Wooders. Cambridge University Pres