chi2(3) = 28.47, Prob > chi2 = 0.000 → Reject RE; choose FE.
Data may arrive in "wide" format (one row per unit, columns for each year). Use reshape long to convert to "long" format, which Stata requires. stata panel data
xtset id year
| Model | Coef. (Hours) | Coef. (Age) | R-squared (within) | |-------|---------------|-------------|--------------------| | Pooled OLS | 0.008** (0.003) | 0.027*** (0.002) | 0.18 | | Fixed Effects | 0.012*** (0.004) | 0.022*** (0.006) | 0.17 | | Random Effects | 0.010*** (0.003) | 0.025*** (0.003) | - | chi2(3) = 28
[ GDP_it = \beta_0 + \beta_1 FDI_it + \beta_2 TRADE_it + \beta_3 GCF_it + \mu_i + \varepsilon_it ] chi2(3) = 28.47