Cass Robert Sunstein (born September 21, 1954) is an American legal scholar known for his work in U.S. constitutional law, administrative law, environmental law, and behavioral economics. He is also The New York Times best-selling author of The World According to Star Wars (2016) and Nudge (2008). He was the administrator of the White House Office of Information and Regulatory Affairs in the Obama administration from 2009 to 2012.
Sunstein serves as the Robert Walmsley University Professor at Harvard Law School. He was previously a professor at the University of Chicago Law School from 1981 to 2008. In 2014, studies of legal publications found Sunstein to be the most frequently cited American legal scholar by a wide margin.
