Table 2.
Topological metrics of the four networks represented in Fig. 3. Values in parenthesis indicates the corresponding Z-Score, calculated by comparing the obtained value of the topological metric with what expected in an ensemble of random networks with the same number of nodes and links.
| Metric | Portugal | Spain | Italy | England |
|---|---|---|---|---|
| Link density | 0.0952 | 0.155 | 0.199 | 0.0972 |
| Max. kout | 2 (0.570) | 7 (1.24) | 9 (1.05) | 6 (7.16) |
| Assortativity | -1 | 0.0419 (0.699) | 0.0459 (1.02) | -0.645 |
| Transitivity | 0.0 (-0.273) | 0.399 (7.89) | 0.434 (11.4) | 0.0333 (-0.269) |
| Efficiency | 0.107 (-0.457) | 0.280 (-5.57) | 0.380 (-13.3) | 0.0972 (-1.78) |
| IC | 4.35 (-1.68) | 73.8 (-8.49) | 134.1 (-11.4) | 4.69 (-2.82) |