From the Freakonomics Blog:
This month in Scientific American, Cornell economics professor Kaushik Basu revisits his twist on the classic Prisoner’s Dilemma. Called the Traveler’s Dilemma, the game involves two travelers who find that identical belongings of theirs have been damaged by an airline. The airline manager agrees to compensate both, but first asks them separately to write down the object’s price as any dollar integer between 2 and 100. If both write the same number, he’ll pay each that amount, but if they write different numbers, he’ll assume the lower is the actual price.