About Lesson
Substitution effect measures change in the amount demanded of a commodity due to the commodity becoming cheaper or dearer in relation to the other.
a) If the price of a commodity falls:
It becomes cheaper compared to others.
Cheaper commodity is substituted for the other.
Thus, the demand for the commodity increases.
b) If the price of the commodity rises:
It becomes costlier compared to others.
Costlier commodity is substituted by others.
Thus, demand for the commodity reduces.