Chance News 48
In other words, the population of a city is [according to Zipf's law], to a good approximation, inversely proportional to its rank [within its country]. Why this should be true, no one knows.
3 March 2009
<div align=right[ http://judson.blogs.nytimes.com/2009/05/19/math-and-the-city/? Steven Strogatz.]