regression - Stata: selecting the reference variables in an interaction -
when run following regression,
reg subject inschool#treatment#male
i comparisons in reference inschool=0, treatment=0, , male=0, able change reference variables.
for example have comparisons done in reference inschool=1,treatment=0, , male=1.
i have used following characteristic command doesn't seem have effect.
char inschool[omit] 1 male[omit] 1
am having syntax issue or there no way choose variable omit using #
thanks in advance!
from help fvvarlist
:
you can specify base level of factor variable using
ib.
operator.
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