Data derived from social networks, such as friendship circles, or similar kinds of linked objects such as web pages. The ways in which these arise often involve positive feedback; for example, if a web page has many incoming links, people are more likely to find it, and hence more likely to add yet more links. For this kind of data the Normal distribution does not apply and the data is more likely to obey a power law.
Used on pages 52, 90
Also known as network phenomena