Answer: consumers find it unfair for firms to increase prices after an increase in demand".
Explanation: Economists established 2 explanations of why companies do not increase their prices even if they can make higher profits.
First it was discovered that some products have the characteristic that the amount of product that a customer wants to buy can depend on the amount of the product that other people are consuming.
And then it was discovered that most people are satisfied that companies raise prices because of an increase in costs, but consider it unfair to raise prices as a result of increased demand.
Step-by-step explanation: