Fig. 3.

Properties of the coupled two-layer friendship (left) and enmity (right) networks obtained from the PARDUS data (grey) and model simulations (green and red): a cumulative distributions of in-degrees ($\mathrm{\nabla }$) and out-degrees ($\mathrm{\Delta }$), b clustering coefficient as a function of degree, c nearest neighbor degree versus degree. To evaluate b and c, the networks were symmetrized