Modified Wald test for groupwise heteroskedasticity in FE models.

Without xtset , commands like L.wage produce nonsense. Solution: Always xtset immediately after loading data.

Before any analysis, Stata must know which variable identifies the panel (individual) and which identifies time.

Plot a single variable with average overlay xtline gdp, overlay

Stata Panel Data Free -

Modified Wald test for groupwise heteroskedasticity in FE models.

Without xtset , commands like L.wage produce nonsense. Solution: Always xtset immediately after loading data. stata panel data

Before any analysis, Stata must know which variable identifies the panel (individual) and which identifies time. Modified Wald test for groupwise heteroskedasticity in FE

Plot a single variable with average overlay xtline gdp, overlay stata panel data