Lesson preview · Price Controls
Price Ceilings
~6 min · Free to read
A price ceiling is a legal maximum price that can be charged for a good. To have any effect, the ceiling must be set below the equilibrium price (a ceiling above equilibrium is non-binding — the market can already reach equilibrium). The classic example is rent control: the government caps how much landlords can charge for rent.
Key Term
Price Ceiling
A price ceiling is a maximum legal price. If set below equilibrium: quantity demanded quantity supplied, creating a shortage. The quantity actually traded (the short side of the market). A deadweight loss triangle emerges from the units that would have been traded at equilibrium but are not.
At the capped price, more consumers want the good ( rises) but fewer producers want to supply it ( falls). The gap between them is the shortage ().
Price normally rations who gets the good. With price held down, something else has to do that job. Four side effects routinely show up:
- Queuing. Buyers wait in line, paying with time instead of money.
- Non-price rationing. Sellers pick who gets served (regulars, friends, lottery).
- Black markets. Illegal resale at prices above the ceiling.
- Quality cuts. Landlords skip repairs; producers drop features.
A binding price ceiling creates a shortage equal to the gap between quantity demanded and quantity supplied at the ceiling price
Worked Example
Demand: . Supply: . A price ceiling is set at 30 dollars. Find the shortage and DWL.
Check yourself · no marks
Rent control is intended to help renters. Does it always succeed?
Commit to one first. Guessing and being wrong beats reading the answer cold.
Practice · 1 / 4
A price ceiling is only binding (has an effect) when it is set:
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