Step (3) in Pedro’s diff-in-diff checklist: plotting the outcome

This is the third Substack post on “Pedro’s diff-in-diff checklist,” a 10-step checklist Pedro Sant’Anna proposed in a recent talk he gave at Amazon. I have been going through each step one at a time to illustrate possible interpretations and implementations of the checklist so that even if you disagree with my interpretation and implementation, you’ll …