Hello,

As my dependent variable is a rare event, I am running forthlogit regressions. In my sample, I have three groups, g1, g2, g3, and I classify g1 and g2 as GROUP A and classify g2 and g3 as GROUP B. My regressions are as follows:
firthlogit y x if GROUP A==1;
firthlogit y x if GROUP B==1.
I need to compare the coefficients on x in the two regressions. Suest doesn't work. Also I cannot use the full interaction like firthlogit y x GROUPB xGROUPB, because there is overlap between GROUP A and GROUP B. Any suggestion on how to compare the two coefficients on x in the two firthlogit regressions would be great helpful to me.

Many Thanks in Advance!