Networks: An Economic Perspective
  We discuss social network analysis from the perspective of economics. We organize the presentaion around the theme of externalities: the effects that one's behavior has on others' well-being. Externalities underlie the interdependencies that make networks interesting. We discuss network formation, as well as interactions between peoples' behaviors within a given network, and the implications in a variety of settings. Finally, we highlight some empirical challenges inherent in the statistical analysis of network-based data. 
Matthew O. Jackson and Brian W. Rogers and Yves Zenou
physics.soc-ph cs.SI q-fin.GN