Implementation Choices¶
While the implementation of the panel estimators is similar to Stata, there are some differenced worth noting.
Clustered Covariance with Fixed Effects¶
When using clustered standard errors and entity effects, it is not necessary
to adjust for estimated effects. PanelOLS
attempts to detect when this is
the case and automatically adjust the degree of freedom. This can be
overridden using by setting the fit option auto_df=False
and then
changing the value of count_effects
.
definitions¶
The rsquared
in returned results) is always the
weights (all estimators)
effects (
PanelOLS
)re-centering (
RandomEffects
)within entity aggregation (
BetweenOLS
)differencing (
FirstDifferenceOLS
)