| grid_pecme | Grid search over the penalty parameter lambda |
| pecme | Fit a penalized ECME censored/missing-response linear mixed model |
| pecme_bootstrap | Cluster (group-level) bootstrap for a pecme fit |
| pecme_effective_df | Working Ridge-type effective degrees-of-freedom approximation |
| pecme_lambda_grid | Build a log-spaced lambda grid |
| pecme_loo | Leave-one-group-out (or leave-one-fold-out) cross-validated log-likelihood |
| pecme_metrics | Comprehensive fit-quality metrics for a pecme model |
| pecme_mi_combine | Combine 'pecme' fits across multiply-imputed data sets (Rubin's rules) |
| pecme_quadrature_check | Check sensitivity of a fitted model to the Gauss-Hermite quadrature order |
| plot.pecme_grid | Plot the regularization path and/or selection-criterion curve |
| predict.pecme | Predict from a fitted pecme model |
| simulate_pecme_data | Simulate data from a censored/missing random-intercept linear mixed model |