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Which methodological approach estimates causal impact of a policy using before-after comparison with a control (difference-in-differences)?
- A-Difference-in-differences (DiD) econometric method
- B-Time-series mean only
- C-OLS without fixed effects
- D-Simple correlation
- Posted By: MCQSEXAM
- Agriculture / Agricultural Economics
- DiD helps infer causal effects when treated and control groups have parallel trends assumption.
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https://www.worldbank.org/
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