Question

Explain the difference between a "change in quantity supplied" and a "change in supply".

Answer 1

Change in supply means movement of tha supply curve towards left or right. Change in quantity supplied means movement along the supply curve. Supply curve moves due to some change in cost and incentive whcih leads to change in the production amount by the producer. Change in quantity supplied only depends on the price of the product.

For example suppose i am producing shirt at $20 per shirt. Now demand for shirt increases and people wants more shirt. So price will increase from $20 to $25. Now i need to produce more shirt in order to maintain the demand. So this is called change in quantity supplied.