Goodmorning everyone,
My question relates to missing values obtained in the output table of a regression which includes a fairly long list of dummies and balancing weights, since I preprocessed data prior to parametric estimation. Some variables are omitted because of collinearity, but the weird thing is the fact that some others are simply not estimated and reported with dots in the output table. What could be the reason?
Thank you in advance for any suggestion.
Giulia