Class 26: Difference-in-Differences in Practice

The goal of Part 3 of this module is to use a DD strategy with real-life data and discuss some current issues with the implementation of DD designs in practice


  • Understand and explain some of the difficulties when interpreting the results of regression-based DD estimates
  • Be aware of alternative estimators that may be applicable in some settings


  • Estimate an event study with constant treatment timing
  • Estimate an event study with differential treatment timing