Michael Schwartz is a professor in the Music, Theatre, and Dance department of Indiana University of Pennsylvania, USA. He has written two books on class development and early 20th century Broadway (Broadway and Corporate Capitalism: The Rise of the Professional Managerial Class 1900-1920; and Class Divisions on the Broadway Stage: The Staging and Taming of the I.W.W., both Palgrave Macmillan), and contributed chapters on musical theatre business (The Routledge Companion to Musical Theatre; The Palgrave Handbook of Musical Theatre Producers), and theatre of the progressive era (Performing the Progressive Era: Immigration, Urban Life, and Nationalism on Stage, University of Iowa Press).