Shift of the Demand Curve Factors

Price of Substitutes

If there is an increase in price of a substitute, then it is likely demand will go up for the commodity. Eg. If the price of Coca Cola increases, the demand for Pepsi will increase.

Consumer Tastes

If a product becomes popular its demand increases, whereas, if a product looses popularity demand decreases. Eg. A positive review from a celebrity of a product will increase the demand for that product.

Consumers' Income

If consumers' income increases, it is essentially equivalent to a decrease in price of the commodity, so will cause an increase in demand.

Complementary Goods

If there is a price change in a complementary item, it can impact the demand for a product. Eg. a decrease in the price of tickets in a movie theatre would increase the demand for popcorn.

Number of Consumers

The greater the number of consumers of a good, the greater the market demand for it. Eg. An increase in population will most likely have this effect on Demand.