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
