Final answer:
An increase in the price of a product can help consumers make an informed decision and signal the quality or scarcity of the product.
Step-by-step explanation:
An increase in the price of a product can serve as a signal to consumers about the quality or scarcity of the product. It can lead consumers to believe that the higher-priced product is of higher quality, and therefore help them make an informed decision. For example, if a restaurant charges high prices, customers may assume that the food is good. Similarly, if the price of a plane ticket is high, it could indicate high demand or a limited number of available seats. This allows consumers to consider alternative options or decide whether and when to purchase.