What Is a Change in Demand?

Demand changes are changes in the quantity of demand caused by non-price factors. That is, when the price of the commodity itself is unchanged, the demand quantity changes caused by changes in other factors, and this change is reflected in the movement of the position of the demand curve. ^[1]

Demand change

Changes in demand are expressed as demand

Change in quantity demanded (change in quantity demanded; change in quantity supplied) refers to the change in the quantity of demand caused by the price change of the commodity itself when other conditions are unchanged. The change in demand is shown on the demand curve. The combination of price and demand moves along the same demand curve.

The change in demand refers to the change in the quantity that consumers are willing and able to purchase due to price changes. The change in demand refers to the change in all demand for consumers at every possible price caused by changes in factors other than prices. Changes in demand are manifested as movements on the same demand curve.

Demand is an aspect of the concept of demand, and it is a quantified concept expressed purely by numbers. Therefore, the change in demand is just an increase or decrease in the index; demand is a comprehensive concept, including the object, type, time, and quantity of demand, so the change in demand may be just a change in one of the elements.