why is gender variable in a fixed effects estimator can the gender dummy be a fixed effect why do you lose the gender dummy do fixed effects include time variables does gender change over time how to keep time invariant variables in the fixed effects estimator what makes a fixed effect why is the gender dummy in the fixed effect estimator does gender change over time can you keep gender dummies in fixed effects if gender is a variable, why is the gender dummy how to keep time dependent variables can a fixed effect be used with a dummy variable how to keep time variables in fixed effects in pool how to keep fixed effects estimator in pooled can a fixed effect estimator be used in a pooled model? how to use fixed effects with time variable why does the fixed effects within model keep gender dummies can you add the period variable to gender dummies how to keep invariant variables