The presence of demand interrelationships among substitute and complementary goods in retail stores was demonstrated by Mulhern in 1989 and was extended by Walters in 1991. Retail pricing strategies should incorporate such demand interdependencies to maximize store profitability. The authors review multiple-product pricing and develop a theoretical framework for retail pricing and promotion policies based on the implicit price bundling of related products. They empirically calibrate how the regular and deal prices of individual brands influence the sales of substitute and complementary items. More important, they demonstrate how retailers can maximize profitability by exploiting the interdependencies in demand that are present among retail products.
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