Season 5, Episode 25

This week on Freakonomics Radio, what’s “the perfect crime?” It turns out that if you are driving your car and run over a pedestrian, there’s a good chance — especially if you live in New York — that you’ll barely be punished. Why?

Also, where have all the hitchhikers gone? Thumbing a ride used to be commonplace. Now you’re more likely to see it happen in the opening scene of a slasher movie. Maybe that explains it.