In a new book called "The Voltage Effect," the economist John List \u2014 who has already revolutionized how his profession does research \u2014 is trying to start a scaling revolution. In this installment of the Freakonomics Radio Book Club, List teaches us how to avoid false positives, how to know whether a given success is due to the chef or the ingredients, and how to practice \u201coptimal quitting.\u201d