[Colleagues are celebrating Professor Eli Noam's illustrious career as he retires from directing the Columbia Institute for Tele-Information (CITI) and his professorship at the Columbia Business School. I am delighted to post A. Michael Noll's personal reflections on Eli's career with the permission of the author.] CITI MEMORIES A. Michael Noll January 5, 2026 Introduction … Continue reading CITI MEMORIES by A. Michael Noll