After working there , he spent a brief time at Yale before going to the New School University .
He was formerly a professor at the University of Chicago where he received his M.A. ( 1973 ) and Ph. D ( 1976 ) .
After working there , professor spent a brief time at Yale before going to the New School University .
He was formerly a professor at the University of Chicago where he received his M.A. ( 1973 ) and Ph. D ( 1976 ) .