Steven G. Mandis Is An Adjunct Associate Professor In Finance And Economics At Columbia Business School, Having Previously Worked At Goldman Sachs And Citigroup And As A Senior Advisor To Mckinsey & Co. He Also Teaches At Columbia University’s Masters Of Sports Management Program. He Is The Author Of What Happened To Goldman Sachs: An Insider’s Story Of Organizational Drift And Its Unintendedconsequences And The Real Madrid Way: How Values Created The Most Successful Sports Team On The Planet (2016).