Tim Harford on Fifty Inventions That Shaped the Modern Economy

<p>Financial Times columnist and author Tim Harford talks with EconTalk host Russ Roberts about Harford's latest book, Fifty Inventions That Shaped the Modern Economy. Highlights include how elevators are an important form of mass transit, why washing machines didn't save quite as much time as you'd think, and the glorious illuminating aspects of light throughout history.</p>