Jill Barshay:

Many major cities around the country, from New York and New Orleans to Denver and Los Angeles, have changed how children are assigned to public schools over the past 20 years and now allow families to send their children to a school outside of their neighborhood zone. Known as public school choice or open enrollment, this policy gives children in poor neighborhoods a chance at a better education. Many supporters hoped it could also be a way to desegregate schools even as residential neighborhoods remain racially divided.

However, a new study of public school choice in Charlotte, North Carolina, finds a deeply troubling consequence to this well-intended policy: increased crime. 

Three university economists studied the criminal justice records of 10,000 boys who were in fifth grade between 2005 and 2008. Thousands wanted to go to highly regarded middle schools, some of which were in nearby suburbs of the large Charlotte-Mecklenburg school district. Seats were allocated through a lottery.