“…By tracking the dramatic shift in segregation from day to night, the researchers hoped to get a fuller understanding of how and where we encounter people of other races. Because they tracked people by neighborhood, they could get a granular understanding of what kinds of places become more diverse during the day. They found that when white people go to work, they are around only slightly more people of color than when they’re in their home neighborhoods. But for everyone else, going to work means being exposed to many more white people — and far fewer people of their own race…”