Dember effect

The demand effect is when the more people want something, the more expensive it gets. Imagine a store that sells apples. At the start of the day, the store might sell the apples for $1 each. But as more and more people come in to buy apples, the store might start to increase the price of the apples. So by the end of the day, the apples might cost $2 each, because so many people wanted them! This is an example of the demand effect.