Economics 1021A/B Lecture Notes - Price Ceiling, Deadweight Loss, Avoidance Speech
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Oct 17, 2011
Economics – Lecture #9
A Housing Market with a Rent Ceiling
A price ceiling or price cap is a regulation that makes it illegal to charge a price
higher than a specified level.
When a price ceiling is applied to a housing market it is called a rent ceiling.
If the rent ceiling is set above the equilibrium rent, it has no effect. The market
works as if there were no ceiling.
But if the rent ceiling is set below the equilibrium rent, it has powerful effects.
At the rent ceiling, the quantity of housing demanded
exceeds the quantity supplied.
There is a shortage of housing.
Because the legal price cannot eliminate the shortage,
other mechanisms operate:
The time spent looking for someone with whom to do business is called search
When a price is regulated and there is a shortage, search activity increases.
Search activity is costly and the opportunity cost of housing equals its rent
(regulated) plus the opportunity cost of the search activity (unregulated).
Because the quantity of housing is less than the quantity in an unregulated market,
the opportunity cost of housing exceeds the unregulated rent.
A black market is an illegal market that operates alongside a legal market in
which a price ceiling or other restriction has been imposed.
A shortage of housing creates a black market in housing.
Illegal arrangements are made between renters and landlords at rents above the
rent ceiling—and generally above what the rent would have been in an