Deciding between FE and RE: The Classic and Robust Hausman Test
If your time variable is structured as dates (e.g., monthly or quarterly), you should apply Stata's internal time formats before running xtset : stata panel data exclusive
predict u, u // panel‑level fixed effect predict e, e // overall error (includes FE) Deciding between FE and RE: The Classic and
When working with panel data ( xtset ), you often need to convert a categorical variable into a set of (where if one is 1, the others must be 0). monthly or quarterly)