I have always wondered why prices ends with 99s, but never really remembered the question long enough to search for the answer, until I read this article.
Why Prices End in 99s: Humans Are Mathematically Incompetent | Epicenter from Wired.com
Which is smaller: 298,548 or 298,000? If you picked 298,548, you’re not alone. That’s the ol’ precision heuristic in price magnitude judgments doing its thing.
I have always thought that they are just trying to make the price ‘sounds’ lower than it is by reducing it by 1. To say ‘300 something’ for a product priced at 399 surely sounds cheaper than ‘400 bucks’!
Need an example? Here’s a very good one:
Here’s another theory to the same question.
It started at Bill’s Texaco in Waco, Texas during a price war. I say it’s a much older management technique to force employees to open cash register drawers for each transaction (making simply pocketing a bill more obvious).
You can read a couple more at The Sraight Dope if you’re interested. Unfortunately, trying to find out who invented it is like trying to find out who invented the hat.
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