The canonical difference-in-differences (DD) model contains two time periods, “pre” and “post”, and two groups, “treatment” and “control”. Most DD applications, however, exploit variation across ...

Day 2: 8 July 2025 15:30 – 17:30 Tokyo Time (TBD) Summary. The Difference-in-Differences ... two-group model, multiple time period, and staggered treatment, and robustness checks such as placebo tests ...