Upward mobility: it's the American dream. But over the past 50 years, the prospects of children earning more than their parents has dropped to 50 percent. What has led to this decline, and what can be done to reverse it? Three economists are using big data to understand the role that college plays in leveling the playing field and giving kids the opportunity to climb the income ladder. You can read a transcript of this episode here: [https://drive.google.com/file/d/16vHNwjE4z-kipBx870gBWAnsVIIxCrqG/view?usp=sharing]