Dear Statalisters
I ran random effects GLS as follows
Y x1 x2 x3 x4 
Since x4 is endogenous with Y I now want to use an
instrument Z. Y is a continuous variable x4 is a
binary variable. I think it would be -ivreg- I would
need
to run. 
Given my data are grouped across workplaces; is
-ivreg- still appropriate. If not can one run an OLS
given the dataset is as above.
If you need further information please let me know.
Thanks in advance
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