How to declare "string" condition in If condition

[quang tam le]

Hello,

I am newbie in Stata and I have a problem with stata when I try to declare If condition.

In my DB, I have "country" variable which has "Germany" values but when I run the regression:

"oprobit adl iadl depression_scale chronicw2 if country==Germany". It said that "Germany not found"
or
" oprobit adl iadl depression_scale if "country"=="Germany" ". It said that "no observations"

How can I fix it?

Thank you

[Nick Cox]

Cross-posted and answered at https://stackoverflow.com/questions/...ition-in-stata

[quang tam le]

Yes, it's me, I posted in 2 places. Sorry about that

[Nick Cox]

See https://www.statalist.org/forums/help#crossposting for our policy.

[quang tam le]

thank you for that info, i will do it next time when i get the answer

[Nick Cox]

Your question has already been answered on SO.