Figure 1: Scaling relationships between traffic and indegree of over 28 000 Web sites, about 2000 of which are the most popular sites and the rest are a random sample. Indegree is the number of incoming links to a particular site as reported by Yahoo, while traffic is the fraction of clicks by Alexa toolbar users that go to a particular site in a 3-month period. Data points are grouped into indegree bins of logarithmic size, and then the traffic is averaged among the sites in each bin. Note the increased noise for highest indegree values, due to the scarcity of data in that range—only a handful of sites like Google and Yahoo have that many incoming links.