Should you be able to sell your organs, or sell your body for sex? “The Body Market” explores the markets for selling your body parts and potentially your dignity. The director of the London School of economics Dame Minouche Shafik doesn’t think there is a fixed amount of altruism in people. Will a kidney market save more lives, or will it crowd out the idea of altruism, donation, and community? Nobel Laureate Joe Stiglitz and Harvard economics chair Greg Mankiw seem to disagree.