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Stephen Dubner and Steven Levitt, co-authors of the Freakonomics book series, have been spending a lot of their time behind microphones lately.

Dubner started Freakonomics Radio ten years ago on a lark, and the podcast has since become a global phenomenon. Levitt, an economist at the University of Chicago, launched his podcast People I (Mostly) Admire when he realized that he could only access a handful of people by writing academic papers.

Tonight, Dubner and Levitt tell their stories and take listener questions.