基礎econ-u03-d01
For a price ceiling to be binding, it must be set:
A. Below the equilibrium price✓ 答案
B. Above the equilibrium price
C. Exactly at the equilibrium price
D. At any price, because a ceiling always binds
解說
A ceiling set above equilibrium is not binding because the market price is already lower. Only a ceiling below equilibrium creates a shortage.