Networks that buy space on lots of tiny sites are changing the business—and putting pressure on ad rates

"The buying power of African-Americans is expected to exceed a trillion — yes, trillion — dollars over the next several years, yet they represent less than five percent of the advertising industry workforce," Markowitz said today, in a statement. "This school will go a long way in preparing our very talented and creative communities of color for exciting and very lucrative careers in advertising and marketing."