Write short note:
Concept of demand
Demand for a commodity refers to the quantity of a commodity that a consumer is willing and is able to purchase at a particular price at any particular point of time. In the concept of demand besides ability to purchase, the ability to purchase is also important. It is only when the consumer has sufficient purchasing power the willingness to purchase the commodity can be regarded as demand. Without the purchasing power, the willingness to purchase is only a desire. For example, an individual may be willing to purchase a house. But it can be termed as demand only when the consumer has sufficient purchasing power for the same.