Practice question · Multiple choice
Comparing two regions before and after a policy the researcher did not control is quasi-experimental, not experimental. What is missing?
Hints
- Ask what randomisation is FOR.
- The two regions were not chosen by coin flip.
Show the answer
B. Random assignment, so the regions are comparable
Why
Randomisation balances unmeasured differences. Without it, correlation with the policy is confounded with whatever made those regions different in the first place.
Practise Quasi-Experimental and Non-Experimental Designs
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