| Formation Model | Evolution Model | ||
| Estimate | Standard Error | Estimate | Standard Error |
Reciprocity | 1.66*** | 0.31 | 1.42*** | 0.41 |
Transitive triplets | 1.00*** | 0.11 | 1.56*** | 0.14 |
Transitive recipr. triplets | −0.26 | 0.23 | 0.02 | 0.23 |
Indegree popularity | −0.04 | 0.16 | −0.02 | 0.05 |
Outdegree popularity | −0.25* | 0.12 | −0.35*** | 0.05 |
Outdegree activity | 0.01 | 0.04 | 0.01 | 0.04 |
Gender (female) alter | −0.14† | 0.08 | −0.16* | 0.08 |
Gender (female) ego | −0.08 | 0.09 | 0.09 | 0.09 |
Gender (female) similarity | 0.17* | 0.07 | 0.10 | 0.08 |
Age alter | 0.01 | 0.01 | 0.03*** | 0.01 |
Age ego | 0.01 | 0.01 | 0.05*** | 0.01 |
Age similarity | 1.52*** | 0.40 | 1.95*** | 0.34 |
Initial contact frequency | 0.03** | 0.01 | 0.01† | 0.01 |
Initial contact duration (min) | 0.01** | 0.003 | −0.001 | 0.002 |