Given that black people are on average rated significantly lower than white people by human raters when they show the exact same qualifications, a policy of "if two applicants are equally qualified, take the black one" (which is the form AA most often takes) is perfectly good advice to any company that wants to improve the quality of its workforce - because, in order to be ranked equal in the first place (and don't fool yourself, there's a lot of human, subjective, feely factors in ranking applicants), the black applicant on average has to be significantly better qualified.