Is it possible that somebody has made a mistake?

The recent Forbes ranking of business schools has the Broad School of Business at Michigan State University at number 19 in the US but does not mention the University of Michigan in the top 100.

The Economist has the Stephen M. Ross School at the University of Michigan in 9th place for the US but does not mention Michigan State University in the world's top 100.

Is it possible that somebody has got the two Michigan schools mixed up?

I notice that the Financial Times Global MBA rankings has University of Michigan in 19th place and Michigan State University in 38th. Could it be that both Forbes and the Economist have made a mistake?