Model card
astris-retention-cox-survival-v1
Cox proportional-hazards survival model (lifelines) producing a full survival curve S(t) and a 90-day retention-risk read. Built on five refugee-support covariates: language-learning velocity, transit access, co-ethnic community distance, time since arrival, and funded-training match.
At a glance
| Kind | retention survival |
| Version | 1.0.0 |
| Status | Active — contributing to scores |
| Ensemble weight | 0.22 |
| Trained at | Not trained yet |
| Trained on | n/a |
| Artifact | No artifact (heuristic or pre-training) |
Metrics
{
"metric": "concordance",
"covariates": 5,
"validation": "synthetic_seed",
"real_cohort": "pending",
"value_approx": 0.73
}Notes
Concordance ~0.73 on internal synthetic validation; real-cohort benchmark pending. Voter in the retention ensemble; also surfaces survival curves in-app — see api/ml/retention_risk.py.