"Take a look at the fascinating new study of regional income mobility differences which David Leonhardt reports on today in the New York Times. It's true: Mississippi has much less income mobility than Connecticut. So do Alabama, Georgia, the Carolinas, Ohio and Indiana. Does Mr Mankiw think people in Indiana are innately less smart or hard-working than people in Connecticut? If not, what differences between Indiana and Connecticut account for the disparity?"
The Great Gatsby curve: Don't worry, old sport | The Economist