Thanks to decades of work by airlines and regulators, plane crashes are nearly a thing of the past. Can we do the same for cars? (Part 2 of “Freakonomics Radio Takes to the Skies.”)

Labor exploitation! Corporate profiteering! Government corruption! The 21st century can look a lot like the 18th. In the final episode of a series, we turn to “the father of economics” for solutions. (Part 3 of “In Search of the Real Adam Smith.”)