Determining factors behind the PageRank log-log plot

  • Authors:
  • Yana Volkovich;Nelly Litvak;Debora Donato

  • Affiliations:
  • University of Twente, Enschede, The Netherlands;University of Twente, Enschede, The Netherlands;Yahoo! Research, Barcelona, Catalunya, Spain

  • Venue:
  • WAW'07 Proceedings of the 5th international conference on Algorithms and models for the web-graph
  • Year:
  • 2007

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Abstract

We study the relation between PageRank and other parameters of information networks such as in-degree, out-degree, and the fraction of dangling nodes. We model this relation through a stochastic equation inspired by the original definition of PageRank. Further, we use the theory of regular variation to prove that PageRank and in-degree follow power laws with the same exponent. The difference between these two power laws is in a multiplicative constant, which depends mainly on the fraction of dangling nodes, average in-degree, the power law exponent, and the damping factor. The out-degree distribution has a minor effect, which we explicitly quantify. Finally, we propose a ranking scheme which does not depend on out-degrees.