predict after bysort varlist: regress

["Oleksandr Shepotylo" <shepotil@econ.umd.edu>]

Dear Statalist,

Is there possibility to use predict after estimation with by?

For example,

 I estimated linear regression using file X1:

      by pensiontype: reg pension age gender region_dummy

then I wanted to predict pension using another file X2. But predict did not
work after regression with by.



Thanks,
Oleksandr

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