Super Irrational at the Supermarket - Dan Ariely

Dan Ariely highlights our irrationality at the supermarket in this brief, but interesting video. Why do we think bigger is always a better deal, even if it isn't? Would love to see him take a trip to one of the warehouse stores where, in my opinion, irrationality abounds. I look forward to Ariely's full article in the July-August HBR.