Stata Panel Data

For long panels (large T):

xtunitroot llc wage, trend lags(2)      // Levin-Lin-Chu
xtunitroot ips wage, trend lags(2)      // Im-Pesaran-Shin
xtunitroot fisher wage, trend lags(2)   // Fisher-type

* Clear memory
clear all
set seed 12345
Now to the heart of the matter: estimating models. stata panel data
We will use a hypothetical dataset employment.dta with variables: For long panels (large T): xtunitroot llc wage,
Assumes the individual effect is random and uncorrelated with the independent variables. * Clear memory clear all set seed 12345




Before typing a single command, you must grasp how Stata "thinks" about panel data.
After FE, Stata reports an F-test that all panel-specific intercepts are zero. Rejecting → FE is preferred.
xtreg wage hours tenure age, re

Mastering Stata panel data requires practice and reference.