Source (NBER) The Effects of School Phone Bans: National Evidence from Lockable Pouches (yesterday) https://news.ycombinator.com/item?id=48014700 https://www.nber.org/papers/w35132

Counter source? (NBER) School Cell Phone Bans and Student Achievement (212 points, 5 months ago, 216 comments) https://news.ycombinator.com/item?id=46124179