Question: If the answer is correct then only i will give helpful rating. Try to explain the given choices. What kind of data do we need

If the answer is correct then only i will give helpful rating.

Try to explain the given choices.

What kind of data do we need to implement difference-in-differences?

  1. Panel data
  2. Cross-sectional data
  3. Time series data
  4. All of the above

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