This week, we’re looking at some of the less savory effects of global trade and market economies. We’ll speak to Mark Harrison, Director of the Wellcome Unit for the History of Medicine and Professor of the History of Medicine at Oxford University, about his book Contagion: How Commerce Has Spread Disease. And we speak to Nora Szech, Professor in the Department of Economics at the University of Bamberg, about her research into the ways that markets influence moral decisionmaking.