3 questions with Fotini Christia, the new chair of the Social & Engineering Systems PhD program | 2020 | News 3 questions with Fotini Christia, the new chair of the Social & Engineering Systems PhD programIDSSOctober 26, 2020 Interview with Fotini Christia about her new position at the MIT Institute for Data, Systems, and Society (IDSS). Read See also Fotini Christia named director of the Sociotechnical Systems Research Center