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.

Question

Quizplus · Accepted Answer

Chay and Greenstone (2003) used a quasi-experiment in their research. This approach is chosen because it allows for the examination of the effects of an intervention (in this case, the Clean Air Act of 1970) in situations where it is not feasible to conduct a randomized controlled trial. They compared health outcomes between communities that were affected by the Act (nonattainment areas) and those that were not (attainment areas) before and after the Act's implementation, which is a hallmark of quasi-experimental design.

In Their Comparison of Health Outcomes Between Communities in Attainment