Question the external validity of the results

Summarize the reading below in 1-2 paragraphs, then raise some questions that can be discussed about the reading in a separate paragraph. Please consider these aspects listed below when writing, you don’t need to literally answer each aspect below but should include most of these aspects in the questions paragraph. Here are the aspects to keep in mind when posing questions about the paper:
1. question assumptions the author makes
2. distinguish between what the author’s data allows them to do and what they would be able to do with the ideal data
3. question the external validity of the results
4. draw policy implications from the conclusions
5. raise comprehension questions
LMK of any questions