| HPCA | Huber Principal Component Analysis for Large-Dimensional Factor Models |
| HPCA_FN | Estimating Factor Numbers via Rank Minimization Corresponding to Huber PCA |
| IQR | Iterative Quantile Regression Methods for Quantile Factor Models |
| IQR_FN | Estimating Factor Numbers via Rank Minimization Corresponding to IQR |
| PCA | Principal Component Analysis for Large-Dimensional Factor Models |
| PCA_FN | Estimating Factor Numbers via Eigenvalue Ratios Corresponding to PCA |
| RTS | Robust Two Step Algorithm for Large-Dimensional Elliptical Factor Models |
| RTS_FN | Estimating Factor Numbers Robustly via Multivariate Kendall’s Tau Eigenvalue Ratios |