Racial discrimination refers to the separation of people through a process of social division into categories not necessarily related to races for purposes of differential treatment. Racial segregation policies may formalize it, but it is also often exerted without being legalized. Researchers Marianne Bertrand and Sendhil Mullainathan, at the University of Chicago and MIT found in a 2004 study that there was widespread discrimination in the workplace against job applicants whose names were merely perceived as "sounding black". These applicants were 50% less likely than candidates perceived as having "white-sounding names" to receive callbacks for interviews. Devah Pager, a