Before revision:  Comparing with empirical data , we show that the model reproduces the observed universal behavior allowing a variant-independent fit of parameters. This analysis also indicates that an age-dependent duplication move appears to be necessary for reproducing the basic network topological observables together with the age correlation between interacting nodes visible in empirical data  .
After revision:  Comparing with empirical data indicates that an age-dependent duplication move appears to be necessary for reproducing the basic network topological observables together with the age correlation between interacting nodes visible in empirical data .