| cigar | Dataset on US Cigarette Demand Panel |
| ife | Estimate Interactive Fixed Effects Model (Bai 2009) |
| ife_select_r | Select the Number of Factors via Information Criteria |
| ife_select_r_unb | Factor Number Selection for Unbalanced Panel IFE via SVT |
| ife_unbalanced | Unbalanced Panel Interactive Fixed Effects Estimator |
| print.ife | Print an IFE Model Summary |