Big chain stores know them and use them to make a profit. What is more, they are willing to pay a lot of money for studies on how to improve them. We're talking about the secrets of optimal product placement.
Last year, most of us were blindsided when we entered our local supermarket, trudged down the toilet paper aisle and were confronted with extended shelves of emptiness. Somewhat disappointed and definitely a little bit anxious (especially if we were running low on the soft, white goodness), we began to wonder how long it would be before we sighted toilet paper again.