Multiple Choice
In their comparison of health outcomes between communities in attainment areas and those in nonattainment areas before and after the Clean Air Act of 1970,Chay and Greenstone (2003) used a:
A) time series analysis.
B) cross-sectional regression analysis.
C) randomized trial.
D) quasi-experiment.
Correct Answer:
Verified
Correct Answer:
Verified
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