| balance_ml | Multilevel covariate balance diagnostics |
| estimate_att_ml | Treatment effect estimation with cluster-robust standard errors |
| ml_match | Within-cluster nearest-neighbour matching with dual-balance optimisation |
| ml_ps | Cluster-aware propensity score estimation |
| ml_weight | Multilevel inverse probability weights |
| plot_overlap_ml | Plot propensity score overlap between treatment groups |
| sens_ml | Tipping-point sensitivity analysis for omitted cluster confounding |
| simulate_ml_data | Simulate clustered observational data |