It actually confirmed quite a few studies by individuals we have already seen on lockdown. The new finding from JP Morgan study is R0 of Alabama, Wisconsin and Colorado are lower after lockdown measures were lifted. If had the study published a few days later, I believe they would have added Georgia to that list too.
Link: https://www.dailymail.co.uk/news/article-8347901/US-states-LOWER-infection-rates-lockdowns-end-study-claims.html