Hello everyone,

I am working on the treatment effects regression adjustments (treatment variable is smoking with three levels - never, sometimes, frequently). I ran the unrestricted regress and the ATE values were statistically significant at 10% level of significance, however after I excluded jointly insignificant variables, the ATE for "sometimes vs frequently" became statistically insignificant. Can I still interpret those values?

Also, I would like to show my pomeans aequations results using graphs, however I am unable to find working command. Could you please advise me whether there exists such a command?

Thank you a lot in advance!
Martha