Feature importance across negative sampling ratios
| Feature | 10% | 50% | 100% |
|---|---|---|---|
| Historical frequency (HF) | 0.330 | 0.422 | 0.451 |
| Preferential attachment (PA) | 0.359 | 0.293 | 0.262 |
| Adapted Adamic–Adar (AA) | 0.311 | 0.285 | 0.287 |
| Feature | 10% | 50% | 100% |
|---|---|---|---|
| Historical frequency ( | 0.330 | 0.422 | 0.451 |
| Preferential attachment ( | 0.359 | 0.293 | 0.262 |
| Adapted Adamic–Adar ( | 0.311 | 0.285 | 0.287 |
Values represent normalized feature gains averaged across all CPV-year combinations. Gains are normalized to sum to 1.0 within each model. The shift toward HF under balanced conditions reflects its role in capturing direct relationship history rather than market-level activity patterns
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