Table 1. Features of the empirical networks and of the networks obtained with the simplest sampling methods: SubFr, RN, EGO preserving the number of nodes and RE preserving both the number of nodes and edges of the friendship network.
| Number of nodes | Number of edges | Density | Average degree | Average clustering | Avg shortest path* | |
|---|---|---|---|---|---|---|
| Contact network | 327 | 5818 | 0.11 | 35.6 | 0.503 | 2.15 |
| Friendship network | 135 | 413 | 0.05 | 6.1 | 0.532 | 4.06 |
| SubFr | 134 | 1235 | 0.14 | 18.4 | 0.546 | 2.22 |
| RN | 135 | 987 | 0.11 | 14.6 | 0.498 | 2.37 |
| EGO | 135 | 1679 | 0.19 | 24.9 | 0.573 | 2.04 |
| RE | 135 | 413 | 0.05 | 6.1 | 0.157 | 3.19 |
*The average shortest path length is computed on the largest connected component of the network.