Our former Dean, Dipak Jain, now Dean of Insead, suggests:

 American schools are often “super-proud” of student bodies in which one-third are international, says Dr. Jain, who was dean at the Kellogg School of Management at Northwestern University until 2009. In classes at Insead, he says merrily, “it looks like the United Nations.”…..Where M.B.A. students at Insead study businesses and business practices from around the world, American curriculums tend to be “very U.S.-centric,” he says, with case studies focused on domestic corporations. A more global outlook might in fact run counter to the fundamental appeal of American schools, he suggests. “The attraction for the U.S. is, people go there to work with the Americans,” he says. “So for U.S. schools, if they become completely international they would lose their competitive advantage.”

There is a difference between teaching international cases and having an international student body.  While international students might want to learn about American business at an American business school, that does not mean they do not want to come here to get a degree (I hope!).  Going global means staying local.