All else equal, what happens to consumer surplus if the price of a good decreases?
a. Consumer surplus increases.
b. Consumer surplus decreases.
c. Consumer surplus is unchanged.
d. Consumer surplus may increase, decrease, or remain unchanged.
The correct answer and explanation is :
The correct answer is:
a. Consumer surplus increases.
Explanation:
Consumer surplus refers to the difference between what consumers are willing to pay for a good or service and what they actually pay. It represents the benefit that consumers receive when they are able to purchase a good at a price lower than the maximum price they are willing to pay.
When the price of a good decreases, all else being equal, consumer surplus tends to increase for the following reasons:
- Existing Consumers Pay Less: If consumers were already purchasing the good at a higher price, a price decrease means they are now paying less for the same quantity. This creates an additional surplus for these consumers, as they benefit from paying a lower price than they previously were.
- New Consumers Enter the Market: As the price of the good decreases, more consumers may be willing to purchase the good because it is now more affordable. These new consumers are willing to pay a price higher than the new, lower price but still lower than their maximum willingness to pay. This expands the area of consumer surplus on the demand curve, as the number of consumers benefiting from the lower price increases.
- Graphical Representation: On a standard demand curve, consumer surplus is represented by the area between the price line and the demand curve, up to the quantity purchased. A price decrease increases the area of consumer surplus because it lowers the price consumers pay, allowing both existing consumers to save money and new consumers to enter the market.
Therefore, a decrease in the price of a good results in an increase in the consumer surplus, assuming no other changes in the market, such as shifts in supply or demand. This is why consumer surplus increases when the price of a good falls.