consumer surplus的意思|示意

Consumer surplus is an economic term used to describe the benefit of consumers when they are able to purchase goods at a price lower than their maximum willingness to pay. It is a measure of the difference between the amount that the consumer was willing to pay for a good and the amount for which the good actually sold.

Consumer surplus is often used to calculate the overall benefit or welfare that consumers receive when they purchase something. It is calculated by adding up the areas of the triangle above the market price and below the demand curve. This area represents the difference between what consumers were willing to pay and what they actually paid.

Consumer surplus can also be used to evaluate the impact of a change in price on consumer welfare. For example, if the price of a good decreases, the consumer surplus would increase because consumers are now able to purchase the good at a lower price. Conversely, if the price increases, the consumer surplus decreases.

The concept of consumer surplus is important to understand in order to properly evaluate the impact of changes in market conditions on consumer welfare. It also allows economists to assess the overall benefit of a good or service. By using this information, economists can more accurately determine the optimal price for a good or service.