• 2022-05-27
    Which of the followings are correct about difference-in-difference(DID) quasi-experiment study?
    A: time series data can be used for DID analysis
    B: panel data can be used for DID analysis
    C: DID analysis compares the changes over time in an outcome of the treatment group to changes over the same time period in the outcome of the control group.
    D: DID analysis is the changes over time in an outcome of the treatment group