This method is an alternative method for a staggered setting which involves creating cohort-specific datasets which consist of treatment cohort along with either never/not-yet treated units within the given period. These cohort-specific datasets are stacked on top of each other to create a stacked dataset.
Useful resources:
Background article that uses this method: Cengiz, D., Dube, A., Lindner, A., & Zipperer, B. (2019). The effect of minimum wages on low-wage jobs. The Quarterly Journal of Economics, 134(3), 1405-1454.
This method is an alternative method for a staggered setting which involves creating cohort-specific datasets which consist of treatment cohort along with either never/not-yet treated units within the given period. These cohort-specific datasets are stacked on top of each other to create a stacked dataset.
Useful resources: