Cass R. Sunstein is an American legal scholar, particularly in the fields of constitutional law, administrative law, environmental law, and law and behavioral economics, who was the Administrator of the White House Office of Information and Regulatory Affairs in the Obama administration. For 27 years, Sunstein taught at the University of Chicago Law School.[3] Sunstein is currently the Robert Walmsley University Professor[4] and Felix Frankfurter Professor of Law at Harvard Law School. After graduation, he clerked for Justice Benjamin Kaplan of the Massachusetts Supreme Judicial Court and Justice Thurgood Marshall of the U.S. Supreme Court, and then he worked as an attorney-advisor in the Office of the Legal Counsel of the U.S. Department of Justice. He was a faculty member at the Law School from 1981 to 2008. Mr. Sunstein is author of many articles and a number of books, including *Republic.com* (2001), *Risk and Reason* (2002), *Why Societies Need Dissent *(2003), *The Second Bill of Rights* (2004), *Laws of Fear: Beyond the Precautionary Principle* (2005), *Worst-Case Scenarios *(2001), and *Nudge: Improving Decisions about Health, Wealth, and Happiness* (with Richard H. Thaler, 2008). He is now working on various projects involving the relationship between law and human behavior.