Can I use diff-in-diff for my research setting?

[Helen Chang]

I want to use the legislation adoption at the state level to perform a diff-in-diff in my panel data. But states adopt the legislation at different year. Can I use diff-in-diff in this case, and how can I perform this?

[Clyde Schechter]

See https://www.annualreviews.org/doi/pd...-040617-013507