complementary products

complementary products

GOODS or SERVICES whose demands are interrelated (a. joint demand) so that an increase in the price of one of the goods results in a fall in the demand for the other. For example, if the price of tennis rackets goes up, this results not only in a decrease in the demand for rackets but, because less tennis is now played, a fall also in the demand for tennis balls. See SUBSTITUTE PRODUCTS, CROSS-ELASTICITY OF DEMAND.