What the experts say

Better math for smarter shopping; 401(k) fees still buried; Government bonds that pay more

Better math for smarter shopping

Your brain on bargains isn’t very bright, said The Economist. Consumers often choose getting something extra for free over getting something cheaper, even when the discount is the better deal. Why? Because “people are useless at fractions,” and struggle to realize that 33 percent extra isn’t as good as 33 percent off the regular price. In a recent study, researchers at the University of Minnesota’s Carlson School of Management sold 73 percent more hand lotion when 50 percent more in quantity was offered than when the lotion carried a discount of 35 percent, which amounts to a better deal. This “numerical blind spot” is just one way that “retailers can exploit consumers’ innumeracy.” Consumers are also confused by double discounting, and are more likely to think that something discounted twice—by 20 percent, and then by an additional 25 percent—is cheaper than something reduced once by 40 percent, even though they are the same. When in doubt, pull out your calculator.

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