Edit this Published in Freakonomics Radio Free-conomics Listen 6 min Queue Download this audio Want to embed this player? Use the code below. More info. <iframe frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/253805/&share=1"></iframe> Share on Facebook Share on Twitter Email a Friend Economists are a notoriously self-interested bunch. But a British outfit called Pro Bono Economics is giving away its services to selected charities.