Omitted variable in logistic regression

[Hm Saleh]

Hi ,
I have a problem with the Logit regression result in Stata. Some of the dummy variables have been omitted from the result.

A screenshot is attached to explain.

Can you help me with how to deal with this problem?

Thank you in advance!

[Jared Greathouse]

No need. Stata's dealt with them because they're collinear.

[Hm Saleh]

What should I do? Can I drop them off?

[Jared Greathouse]

Stata does that for you, you can get rid of them if you'd like, but Stata's done that job for you.