You should summarize the author(s)’ argument in the first part of the paper and in the rest of it you should write about your reaction to the reading.
For example, why did you agree or disagree with the reading? How the reading makes you rethink your opinion about the issue? What other issues or
questions come to your mind after the reading? What weaknesses and strengths do you
see in the author’s argument?
American Economic Review: Papers & Proceedings 2012, 102(3): 1–23
Does the Current Account Still Matter?