Hi! I am trying to run a regression with multiple moderators. I am introducing each of the moderators separately. However, when I add the final moderator all of the coefficients and p values are the same. Could not find the solution online. Tried to fix for multicollinearity by mean centering but was unsuccessful.
My results:

Command
reg CO2_gr_aver HHI FirmAge i.Type_numeric Firm_gr X4m c.Firm_gr#c.X4m X5m c.Firm_gr#c.X5m X2m c.Firm_gr#c.X2m X1m c.Firm_gr#c.X1m
Appreciating any help!
My results:
Command
reg CO2_gr_aver HHI FirmAge i.Type_numeric Firm_gr X4m c.Firm_gr#c.X4m X5m c.Firm_gr#c.X5m X2m c.Firm_gr#c.X2m X1m c.Firm_gr#c.X1m
Appreciating any help!
