In a perfectly competitive market for potatoes, implementing a price floor above the equilibrium price will necessarily lead to an increase in consumer surplus because consumers benefit from stable pricing.

In a perfectly competitive market for potatoes, a price floor set above the equilibrium price means that sellers cannot sell potatoes for less than this minimum price. While it might seem that stable pricing benefits consumers, this actually leads to higher prices than they are willing to pay. As a result, some consumers will buy fewer potatoes or stop buying them altogether, which reduces consumer surplus. For example, if the equilibrium price of potatoes is $1 per pound and the price floor is set at $1. 50, consumers who were happy buying at $1 may now only buy a smaller amount at $1.