Stacked Difference-in-difference

[Md Sumon Ali]

Hello everyone, In my study, I am panning to use stacked based DiD model since events are not the same for different firms. But, before running this model, I want to check parallel trend. It will be helpful for me if someone give me code for graph.

Thanks in advance

[Jeff Wooldridge]

There’s no advantage to stacked DiD. Use jwdid with the never option and the built-in graphing capabilities.