Data: Stata Panel

R-squared = 0.32

Or use xtreg, fe vce(cluster country) for cluster-robust inference. stata panel data

* Check data summary xtsum hours grade age * Tabulate observations over time xttab year * Visualize trends over time xtline hours if idcode < 10 Use code with caution. 4. Modeling Stata Panel Data: Key Models R-squared = 0

D.income calculates the difference between the current and previous period ( 2. Exploring and Visualizing Panel Data R-squared = 0.32 Or use xtreg

A significant test statistic indicates that the error variance differs across panels.

The FE model ( xtreg, fe ) is used to control for unobserved variables that are constant over time within an entity ( ). It only analyzes within variations. xtreg ln_wage grade age, fe Use code with caution. 4.3. Random Effects (RE) Model