Stephen Dubner is the host of Freakonomics Radio, co-host of No Stupid Questions, and co-author of the Freakonomics books, which have won many awards and sold millions of copies around the world.

Angela Duckworth is co-host of No Stupid Questions and the founder/CEO of Character Lab, a nonprofit whose mission is to advance scientific insights that help children thrive. She is also a professor of psychology at the University of Pennsylvania, a MacArthur Fellow, and the author of Grit: The Power of Passion and Perseverance.

Steve is the host of People I (Mostly) Admire and co-author of the Freakonomics books, which have won many awards and sold millions of copies around the world. He is also a professor of economics at the University of Chicago, where he directs the RISC Center (Radical Innovation for Social Change).

Bapu is the host of Freakonomics, M.D., a professor at Harvard Medical School, a physician at Massachusetts General Hospital, and a faculty research fellow at the National Bureau of Economic Research. Bapu has an M.D. and a Ph.D. in economics from the University of Chicago, where he studied under Steve Levitt.