In your review, you should provide a summary of the main points covered in the article and the general methods or evidence that the author used. Focus should be place on the relevant parts of the article not on every technical detail. In addition to summarizing the articles, you should also critically evaluate the articles.

Questions that you should think about:

1) How are those articles related to your topic?

2) What data source they use?

3) What statistical methods they use?

4) What are the strengths of these works?

5) What are their weaknesses?

6) Do these articles give different answers on the same research question? Why?

Properly cite all references at the end of your literature review.