Why price ceilings create deadweight loss by preventing mutually profitable trade

Price controls often lead to unintended consequences, including deadweight loss. This video explains why limiting prices restricts trading volume, causing both buyers and sellers to miss out on gains that would otherwise occur in a free market, illustrated through a gasoline price ceiling example.

Deadweight loss represents the value of mutually profitable trades that never happen because of government-imposed price ceilings. When a price is artificially capped, the market cannot clear at its natural equilibrium, resulting in a reduction in the total volume of goods exchanged.

By using the example of gasoline, the video demonstrates how to calculate this loss. Because fewer transactions take place than would occur in an unconstrained market, the potential economic surplus for both consumers and producers is diminished, leaving both sides worse off than they would be under free trade.

Source: Price Ceilings: Deadweight Loss