The department isn't explicitly Marxist, not by a long shot. Undergrad econ majors were not being indoctrinated during my time there, since I myself spent hours there taking a wide variety of classes and didn't personally witness it.

What I can say is that the program was heavy on theory, philosophy, and history. It was very light on mathematics and statistical modelling.

It's considered Marxist due to one man, Hans Ehrbar. He was tenured, and a hard core Marxist. His class was insanely difficult and his self written study guide on Das Kapital was harder to understand than Marx himself. Other professors were definitely leftists, but fairly objective from what I recall. Ed Lazear once came to give a keynote to the business school and I do recall one loser of a grad assistant making an absolute butt of himself criticizing such a distinguished economist.

It's not Marxist, but it is leftist. At the time It didn't prepare undergrads for more difficult graduate programs.