What is a Maximum Price Ceiling?
A maximum price ceiling is a form of government intervention that prevents the price of a good or service rising too high. This is because the high price of the good or service would be considered unfair.
The use of maximum price ceilings in the real world can be found in the housing market e.g. to put a max price on rent. In the U.K, rent controls were essentially abolished in the late 1980’s under the Thatcher government.
Since this time the government has been more focused on increasing the total supply of property e.g. through social housing. Maximum prices ceilings still exist in the U.S however, e.g. rent controls in Manhattan.
How does a maximum price ceiling work?
Before the use of a maximum price ceiling the market equilibrium rested at price and quanity P1 - Q1. The introduction of a maximum price ceiling caps the price at PM, the quantity that producers are willing to supply falls to Q3 whilst quantity demanded increases to Q2.
There is an excess demand illustrated by the area Q2 - Q3.