What do you mean by shift in demand curve?


Shift in demand: When there are change in factors other than a good’s own price which effect the quantity purchased, we call these changes shift in demand.
Demand increases when the quantity demanded at each price increases, and when the demand decreases the quantity demanded at each price decreases.

An example of how a change in a non-price variable shifts the demand curve is as follows:-
Example: We know that the average income of Americans rose sharply during the long economic boom of the 1990s. Because there is a powerful income effect on the demand for automobiles demanded at each price rise.

for example, if the average income rose by 10 percent, the quantity demand at each price of $10,000 might rise from 10 million to 12 million units. This would be a shift in the demand curve because the increase in quantity demanded reflects factors other than the good’s own price. The net effect of the changes in under lying influences is what we call an increase in demand.

 
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