Improspectives

I’m sure many of us understand the denomination effect on a visceral level. If you’ve ever been in a store, saw something you wanted, but hesitated to buy it because you’d have to pull out a big bill, you’ve experienced this effect. Why did you hesitate? Because you knew that breaking that $20, $50 or $100 bill made it that much easier to spend your change.

Perhaps that’s why prices near a dollar amount, particularly $4.99, $9.99, $19.99, and $99.99 are so attractive to the consumer’s eye. You’re trading one physical item (a printed piece of paper) for another (perhaps a flash drive) and getting a tiny bit of money back. I wonder how much of the attractiveness of prices just below a currency denomination depends on the fact that you’re getting some change back as opposed to the first number being one less (e.g., $19.99 versus $20.00). I bet the two phenomena are intertwined in some interesting psychological ways.

You also see the denomination effect at work in gambling, but the effect works differently there depending on the game and situation. Knowledgeable poker players experience the reverse effect, becoming less likely to get involved in hands when they have fewer chips in their stack. They hesitate to invest in a hand because, when you are low on funds, the relative value of each chip goes up. Other players can use this hesitancy to their advantage and bet big to drive the small stacks out of a pot, but the small stacks can make a modest bet to induce a bluff raise from a big stack, but the big stacks can raise and hope the small stacks will think they’ve fallen into their trap, but…

You get the idea. Poker’s fun, but bring aspirin.