I assume it is the study referenced below, I'd wait for more peer review.
https://www.washingtonpost.com/news/wonk/wp/2017/06/26/new-s...
Top comment:
>A non-peer reviewed study that left out all large employers. Seriously! I can't believe the Post did a story on this. Wait for it to actually get published, and then we can talk about how any study on employment that leaves out all the national chain stores is totally bogus. Really this is very shoddy work. I'm disappointed with the Post for highlighting it. At least wait until it got published. This is one step above click-bait.