"Zwischen Partizipationsversprechen und Algorithmenmacht. Wie soziale Medien Meinungsbildung und Orientierung in der Welt prägen [Between Promise of Participation and Power of Algorithms. How Social Media Impacts Opinion Formation and Orientation in the World]“, lecture by J.-H. Schmidt at the theme days "Digitale Medien [Digital Media]" at the Institute for Cultural Management and Media Management at the Hamburg Academy of Music and Drama on 26 April 2018 in Hamburg.