PR ‘PR is all but invisible at the MBA level’ PRSA researchers found that 80 percent of business schools in the United States all but ignore the function of PR. So the trade group teamed up with five universities to train MBA students. By Matt WilsonJune 21, 2012 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.