Explanation
A shift in demand occurs when an influencing factor other than price changes. Those factors are:
- The income ofbuyers
- The tastes and preferences of buyers
- The prices of other goods and services, especially substitutes and complements
- Expectations of buyer about the future
In this question:
- 'Prices of complementary goods decrease' will lead toquantity demanded for that complements rising, then demand for consumer good will increase accordingly.
- 'Price of the consumer good decreases' will increase the quantity demanded for that good, but it will not shift the demand curve
- 'Customers' expectation of higher prices in the future': in this scenario, customers tend to buy more to store in present, which leads to demand curve shifting to the right
- 'Consumer tastes shift toward substitute products': Demand for substitutes will rise, so demand forthat consumer good will decrease and the demand curve shifts to the left.
LO 2, AC 2.2