While playing hooky from a conference in Boston a few years back, three former colleagues from Northwestern's Kellogg School of Management hopped in a car and headed on a road trip. They pulled into a shoe store in Maine and noticed that the sales help was unusually pushy. After a few questions, they discovered the store had a "secret shopper" program, in which employees would be marked down if they were not sufficiently aggressive with customers. A lightbulb went off.
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