In the following question you are asked to determine, other things equal, the effects of a given change in a determinant of demand or supply for product X upon (1) the demand (D) for, or supply (S) of, X; (2) the equilibrium price (P) of X; and (3) the equilibrium quantity (Q) of X. An increase in the price of a product that is a complement to X will:
Multiple Choice
decrease D, decrease P, and decrease Q.
increase D, increase P, and decrease Q.
increase D, increase P, and increase Q.
Ans: decrease D, decrease P, and decrease Q.
Explanation:
The cross-elasticity of demand is negative for the complementary goods. It means when the price of a product increases then the demand for the complementary goods will decrease. Complementary goods are those goods which are used or consumed jointly. So , an increase in the price of a product that is a complement to X will lead decrease in demand for good X . As a result quantity demanded of good X decreases and also decrease in price of good X.
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