Regarding the article "Interpreting the results of cost-effectiveness studies," by David J. Cohen and Matthew R. Reynolds:

1. how can someone summarize the findings of this article?

2. how can someone evaluate this paper in the context of the literature? Be able to succinctly summarize the value added of this article to the broader literature.

3. how can someone critically analyze this article, and what are the causal effects?

4. are there any potential problems or shortcomings of this paper? Do they address any endogeneity of primary variable of interest? Is the natural experiment problematic?

5. how does the paper conclude? Explain each point in detail.