

Zipf, Powerlaw, Pareto  a ranking tutorial 
  Although the literature surrounding both the Zipf and Pareto distributions is vast, there are very few direct connections made between Zipf and Pareto, and when they exist, it is by way of a vague reference [1] or an overly complicated mathematical analysis[2,3]. 
  This is exactly the definition of the Pareto distribution, except the x and y axes are flipped. 
  Whereas for Zipf, r is on the xaxis and n is on the yaxis, for Pareto, r is on the yaxis and n is on the xaxis. 
 www.hpl.hp.com /research/idl/papers/ranking/ranking.html (1699 words) 
