If I am comparing fixed effects and pooled OLS models to test or time-invariant unobserved heterogeneity, would I include a control for year effects in my fixed-effects regression or NOT include such a control?
And if so, why would we include controls for year effects in fixed effects models but not pooled OLS?
And if so, why would we include controls for year effects in fixed effects models but not pooled OLS?
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