We are raiding the Audio Long Read archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2018: There are 13,000 business schools on Earth. That\u2019s 13,000 too many. And I should know \u2013 I\u2019ve taught in them for 20 years. By Martin Parker. Help support our independent journalism at theguardian.com/longreadpod