M D Is Sponsored by Dave's Killer Bread

Once upon a time, Bapu Jena was a graduate student at the University of Chicago. His most interesting teacher? The economist Steve Levitt. This week on Freakonomics, M.D., a replay of a conversation between Steve and Bapu from Steve’s podcast, People I (Mostly) Admire, where they cover everything from the ethics of human-challenge trials to why Bapu decided to start his own show.