Police rarely move between jobs and departments. But according to a paper co-authored by the University of Chicago law professor John Rappaport, officers aren’t necessarily choosing to stay in the same place—a lot of policies have made it costly for them to switch. And that lack of mobility can have all kinds of ripple effects.Get more from your favorite Atlantic voices when you subscribe. You’ll enjoy unlimited access to Pulitzer-winning journalism, from clear-eyed analysis and insight on breaking news to fascinating explorations of our world. Subscribe today at TheAtlantic.com/podsub. Learn more about your ad choices. Visit megaphone.fm/adchoices