Dear all,

I was wondering about what would the right way to form a list or matrix or a variable (either of them would work for me) of confidence intervals of the coefficients of the interaction term treat#ib2005.year from the regression:

regress index treat i.id ib2005.year treat#ib2005.year, vce(cluster id) (2005 is the base year)

I am aware of the command - _b[foreign] - invttail(e(df_r),0.025)*_se[foreign] to generate the 95% lower bound and using + to generate upper bound. However, how to specify the interaction term in place of "foreign"?

I want to form a list or matrix of confidence intervals for all 10 coefficients (corresponding to 10 years) of treat#ib2005.year.

What is the right way to do that?

Thanks in advance!