Hello,

I ran both a fixed effects model and pooled OLS model on the same dataset. I am now wondering if, including year dummies and thus time effects, is comparable in both regressions. In the literature they mention "time fixed effects" to control for variables that are constant acreoss firms but change over time in the fixed effects model and "aggregate time effects" in the pooled OLS model. I am now wondering if the regression happens in a different way concerning these time dummies. And if so, what is the difference?

Kind regards,
Timea