ID, Var2020, Var2021, Var2022.
Researchers often want to compare effects across "exclusive" contexts, such as high-performing vs. low-performing firms. Interaction Terms stata panel data exclusive
ssc install synth_runner synth_runner y x1 x2, trunit(5) trperiod(2010) gen_vars ID, Var2020, Var2021, Var2022
A common mistake in panel data is assuming independence of observations. In reality, panels often suffer from serial correlation (within a unit over time) and cross-sectional dependence (shocks affecting all units simultaneously). stata panel data exclusive
If you want "State-owned" ( 3 ) to be the base group:
The solution is the or System GMM , specifically via the xtabond2 command (available via SSC). Why xtabond2 ? Unlike the built-in xtabond , xtabond2 allows for: Hansen J-tests for overidentifying restrictions. Arellano-Bond tests for autocorrelation.