Serendipity at the supermarket occurs when you spot your favorite cereal and have the coupon in hand. More likely, though, you have to hunt for your coupon, only to discover that it expired last week. At that point, you can either pay up or settle for the cheaper generic -- unless, that is, you're able to get a coupon on demand.
This third option, available at some stores by a company called VisibleBrands, is one made possible by analytics. Read more in
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