Event study from DID regression

[Oliver WB]

I have conducted a regression of the following form: reg Price treatment i.time_dummy treatment##i.time_dummy. This is sort of my DID model regression.

I want to be able to plot the coefficients with each observation having a vertical confidence interval around it. This, so I could make an illustration of parallel trends.

However, I cannot figure out how to do this. I have tried to download event study plugins to stata but with no success. Is there an easy way?

Thanks!

[George Ford]

are the treatments rendered at different times?

[Oliver WB]

Hi - no all are rendered at the same time!

[George Ford]

lgraph y time if ~post, by(treated) err(se)