Question
Distinguish between change in quantity supplied and change in supply. Use diagram.

Answer

Basis
Changes in quantity supplied
Change in supply
Meaning
The change in quantity supplied due to the change in price of the commodity.
Change in supply due to the change in factors other than price.
Alternative name
Movement along the supply curve:
Shift in supply curve:
(i) Expansion in supply.
(i) Increase in supply.
(ii) Contraction in supply.
(ii) Decrease in supply.
Meaning
(i) It states that rise in quantity supplied due to the rise in price of the commodity.
(i) An increase in supply means that producers now supply more at a given price level.
(ii) It states that fall in quantity supplied due to the fall in price of the commodity.
(ii) A decrease in supply means that producers now supply less at a given price level.
Schedule
Expansion
Contraction
Price
Supply
Price
Supply
2
4
8
10
4
2
10
2
Increase
Decrease
Price
Supply
Price
Supply
4
4
8
10
4
4
10
8
Diagrams

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