Mulligan’s research explores legal and technical means of protecting values such as privacy, freedom of expression, and fairness in emerging technical systems. Her book, Privacy on the Ground: Driving Corporate Behavior in the United States and Europe, a study of privacy practices in large corporations in five countries, conducted with UC Berkeley Law Prof. Kenneth Bamberger was published by MIT Press. She is a member of the Defense Advanced Research Projects Agency Information Science and Technology advisory board; a member of the National Academy of Science Forum on Cyber Resilience; a Commissioner on the Oakland Privacy Advisory Commission; and a board member of the Center for Democracy and Technology, and the Partnership on AI.