In 2000, Drs. Sheena S. Iyengar and Mark R. Lepper set up a tasting booth at an upscale grocery store in California. On some days, they put out a selection of six types of jam; on other days they set out twenty-four. Although the wider selection attracted more shoppers, more people bought the jam when there were fewer options. It seemed the more choices people had, the harder it was to make a decision. More...