David J. Bier

David J. Bier is the Director of Immigration Studies at the Cato Institute, where he holds the Selz Foundation Chair in Immigration Policy. A relentless data-driven analyst of legal immigration, border security, and interior enforcement, he is best known for showing that fewer than 1 percent of people who want to move to the United States can legally do so, and for the Powerball analogy that reframed the legal-immigration debate. His research has been cited by the U.S. Supreme Court and multiple federal appeals courts, and he testifies regularly before House and Senate committees.