Dear Statalisters,
I want to classify the sample into two parts accoding to a dichotomy
variable and apply them a same regression model.
For instance, I want to divide the sample into the subsample A where a dummy
takes one and the subsample B where a dummy takes zero.
I do this by generating two new worksheets for subsamples A&B in MS-Excel,
and then run a regression twice in Stata7.
How do I do these procedures using only Stata instead of generating new worksheets in Excel?
Thank you in advance.
Nobuya Fukugawa
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