NAD Addresses Math Problems In Counting Reviews

Function claimed that it had "over 110,000 5-star product reviews" for its hair care products, the majority of which come from its "shampoo and conditioner" category. A competitor filed an NAD challenge pointing out that the total number of 5-star reviews across all product categories was only 63,831. So how did Function get to 110,000? Normally, I turn to our team of economists at Georgetown Economic Services to sort through these tricky math questions, but I was able to figure this one out on my own.

Function normally sells its shampoo and conditioner as a set, and when consumers are invited to write reviews, and select a category, the only relevant category available is "shampoo and conditioner." In other words, consumers can't pick one or the other. Thus, when consumers left a review in the "shampoo and conditioner" category, Function counted the single review as a review for two products. Talk to your own economists, if you want to double-check the math, but