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Regression dummy variables Q&A

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Interpretation of coefficients
R studio, Stata, SPSS, SAS, Eviews - it doesn't matter. It's all about dummies in regression.
Include original factor or dummies?
Analyze the dummies separately from other predictors?
Remove levels of a factor if not significant?
Vif when regression contains polytomous categorical variables
R studio, Stata, SPSS, SAS, Eviews - it doesn't matter. It's all about dummies in regression.
Include original factor or dummies?
Analyze the dummies separately from other predictors?
Remove levels of a factor if not significant?
Vif when regression contains polytomous categorical variables