Before any analysis, Stata must understand the data’s dimensions. The foundational command is: xtset panelid timevar The entity (e.g., Country ID). The sequence (e.g., Year). This command enables Stata’s suite of
To test for serial correlation in the linear panel-data models, use the Wooldridge test: * ssc install xtserial xtserial y x1 x2 Use code with caution. Testing for Heteroscedasticity stata panel data exclusive
Ignoring cross-sectional dependence can lead to severely biased standard errors. Stata's xtreg with vce(cluster) offers some protection, but dedicated tests are essential for model validation. Before any analysis, Stata must understand the data’s
Once you've xtset your data, Stata remembers the panel structure, enabling you to use the entire family of xt commands. Stata will inform you whether your panel is (all units observed at all time periods) or unbalanced (some observations missing). This command enables Stata’s suite of To test
xtreg y x1 x2, fe