Table 2. Features of the friendship network and of the sampled networks obtained by RE, RNref and EGOref method, all of them preserving the number of nodes and edges of the friendship network.
| Number of nodes | Number of edges | Density | Average degree | Average clustering | Avg shortest path* | |
|---|---|---|---|---|---|---|
| Friendship network | 135 | 413 | 0.05 | 6.1 | 0.532 | 4.06 |
| RE | 135 | 413 | 0.05 | 6.1 | 0.157 | 3.19 |
| RNref | 135 | 413 | 0.05 | 6.1 | 0.197 | 3.21 |
| EGOref | 135 | 413 | 0.05 | 6.1 | 0.355 | 3.90 |
*The average shortest path length is computed on the largest connected component of the network.