Economists Are Primarily Writers of Econ Essays
Many economists falsely think of themselves as scientists who just “write up” research. We are not; we are primarily writers. Economics and finance papers are essays. Most good economists spend at least 50% of the time they put into any project on writing. For me, it’s more like 80%.
From the main conclusion in "Writing Tips for Ph. D. Students," by economist and professor of finance John H. Cochrane, Graduate School of Business at the University of Chicago
Several other tips from Professor Cochrane:
Figure out the one central and novel contribution of your paper. Write this down in one paragraph. As with all your writing, this must be concrete.
Distilling your one central contribution will take some thought. It will cause some pain, because you will start to realize how much you’re going to have to throw out. Once you do it, though, you’re in a much better position to focus the paper on that one contribution, and help readers to get it quickly.
Your readers are busy and impatient. No reader will ever read the whole thing from start to finish. Readers skim. You have to make it easy for them to skim. Most readers want to know your basic result. Only a few care how it is different from others. Only a few care if it holds up with different variable definitions, different instrument sets, etc.
A good paper is not a travelogue of your search process. We don’t care how you came to figure out the right answer. We don’t care about the hundreds of things you tried that did not work. Save it for your memoirs.