WS More or Less: How Should We Think About Spending?

Tim Harford talks to economist Dan Ariely about the psychology of money. They discuss how understanding the way we think about our finances can help us to spend more carefully and save more efficiently. Plus Dan explains how to never have an argument over sharing a restaurant bill again.

(Photo: Mannequins in a shop window wearing sale t-shirts. Credit: Sean Gallup/Getty Images)