![Freakonomics Radio show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/745/small/freakonomics-radio.jpg)
Summary: <p>The psychologist Angela Duckworth argues that a person's level of stick-to-itiveness is directly related to their level of success. No big surprise there. But grit, she says, isn't something you're born with -- it can be learned. Here's how.</p>