We now describe the four independent statistical calculations which
we have used to analyse average age time series 
, 
, generated by the network. In all the calculations reported below,
. The network was actually run for more than 
token
passes and the first 12% of values of 
were rejected to exclude the
initial transient.
In particular we are interested in calculating the Hurst parameter H, which is a measure of the degree to which a time series is self-similar. The calculations are based on [Leland 1994], [Garrett 1994], [Mandelbrot 1969]--[Beran 1992].