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Dr Roth is the Senior Director of Safety & Integrity at Twitter. He leads Twitter's policy and threat investigation teams responsible for security, authenticity, and content policy, including misinformation, election security, data privacy, and user identity. Before joining Twitter, Yoel received his PhD from the Annenberg School for Communication at the University of Pennsylvania. His research and teaching focused on understanding how policy, governance, and code influence the types of communities that are able to safely and securely form online — and how the choices of developers, designers, and policymakers can systematically push certain types of identities and communities to the digital margins.