DiD Advanced Tool I

Difference in Differences – Advanced tools (Part 1)

• Reminders on Simple DiDs

o   Canonical DiD

o   TWFE DiD

• The DiD Revolution

o   What’s Trending in DiD?

o   Non Parallel Trends

o   Variation in the Treatment Timing

o   Sampling Issues

• Paper Illustration

• Hands-on Session

📝 Main references: Baker et al (2022), Callaway and Sant’Anna (2021), Cunningham (2020), Goodman-Bacon (2021), Roth et al (2023).

🖫 Datasets: castle_doctrine_law from Cheng and Hoekstra (2013), callaway from Cunningham (subset from Callaway and Sant’Anna (2021)).