Classification of diverse simulated and real-world networks: (a) WSD vs. network order in Zou’s model with different modules (decided by the inputs s and k where other inputs of the model are set as m = 3 and α = 1). (b) Ratio of the WSD to the network order in 12 real-world networks whose descriptions are included in Table 1. Note that each quantity in panel (a) is an average over 10 realizations.