Figure 12
Measures of the strength of links over time. (Left) Distribution of the persistence of links. (Right) The fraction of surviving links as a function of time follows a power-law like decrease [74]. Figures reprinted from Phys A: Stat Mech Appl, 387(12), Hidalgo, C.A. and Rodriguez-Sickert, C. The dynamics of a mobile phone network, pp 3017-3024, Copyright (2008), with permission from Elsevier.