Emmanuel Saez is professor of economics and director of the Center for Equitable Growth at the University of California, Berkeley. His research focuses on tax policy and inequality from both theoretical and empirical perspectives. With Thomas Piketty, he has constructed long-run historical series of income inequality in the United States that have been widely discussed in public debate. He received his PhD in economics from MIT in 1999. He was awarded the John Bates Clark Medal of the American Economic Association in 2009 and a MacArthur Fellowship in 2010. Gabriel Zucman is professor of economics and public policy at the University of California, Berkeley. His research analyzes the accumulation and distribution of wealth through global and historical perspectives. He received his PhD in economics from the Paris School of Economics in 2013. He was awarded the Bernácer Prize in 2018 and a Sloan Research Fellowship in 2019. He is the author of The Hidden Wealth of Nations: The Scourge of Tax Havens, which has been translated into eighteen languages.