Weighing the benefits and drawbacks of school smartphone bans

This is Ask an Expert where every weekday at 9:20am on KCBS we're giving you direct access to top experts in various fields. Thousands of schools have implemented cell phone bans in the classroom but a new study shows the academic payoff hasn't arrived yet. That doesn't mean the bans make no difference. To tell us more, KCBS Radio News Anchor Steve Scott spoke with Professor Hunt Allcott with Stanford's Doerr School of Sustainability and co-author of this study.