There are several determinants of demand shift, including:

1. Price of the product: A change in the price of a product can lead to a shift in demand. For example, if the price of a product decreases, the demand for that product may increase.

2. Income: Changes in income can also lead to a shift in demand. If people’s income increases, they may be able to afford more goods and services, leading to an increase in demand.

3. Consumer tastes and preferences: Changes in consumer tastes and preferences can also lead to a shift in demand. For example, if a new trend or fashion becomes popular, the demand for products related to that trend may increase.

4. Population: Changes in the size and composition of the population can also affect demand. For example, if the population increases, the demand for goods and services may also increase.

5. Availability of substitutes: The availability of substitutes for a product can also affect demand. If there are more substitutes available, consumers may switch to those substitutes, leading to a decrease in demand for the original product.

6. Advertising and marketing: The effectiveness of advertising and marketing efforts can also influence demand. If a product is heavily advertised and marketed, it may lead to an increase in demand.

7. Government policies: Government policies, such as taxes or subsidies, can also affect demand. For example, if the government imposes a tax on a product, it may lead to a decrease in demand for that product.

These are just some of the determinants of demand shift, and they can vary depending on the specific product or market.