Here's the 'Extract' (the full article seems to be gated but this gives you the idea):
During a lunchtime chat in 1993, Matthew Jackson first became interested in social and economic networks. Jackson and a colleague were discussing how power depends on networks of relationships. As an economist, Jackson had always been interested in modeling and analyzing social interactions and human decision-making. Soon, he and his colleague followed up on their lunchtime discussion by building game theoretic models of how people choose to form relationships (). “Once I started getting interested in the subject, there were lots of different angles on it that became interesting, and I just started working on it more and more,” he says.