In "Freakonomics," journalist Stephen Dubner and economist Steven Leavitt explored economics and human behavior. Kai Ryssdal talks to the two about their sequel, which applies the law of unintended consequences to prostitutes and global warming.

A Moody's analyst said the U.S. government may soon have to downgrade its triple-A ranking, which would force the U.S. to pay higher interest rates to borrow. What does this mean for Treasury bond investors? John Dimsdale reports.

Last year, Marketplace's Jeremy Hobson interviewed two Wall Street workers who had just lost their jobs at the start of the financial crisis. Hobson checks in on them again and gets their thoughts one year later.