Hello statalists!


I have a very beginner question,
I am working on a panel dataset trying to estimate the effect of a policy that was implemented in some provinces in Argentina.
I would like to ask you how it is possible to test for parallel trends in a Diff in Diff case with lags and leads. I tried to look on the internet and I found the Autor paper, but I find it difficult to practically implement it with Stata.

The code I used for the Diff in Diff is
PHP Code:
xtreg depvar DiD controls, fe cluster(clustervar) 
Thank you very much in advance!