Complementarity without Superadditivity
The distinction between complements, substitutes, and independent goods is important in many contexts. It is well known that when consumers’ conditional indirect utilities for two goods are superadditive, the goods are gross complements. Generalizing insights in Gans and King (2006) and Gentzkow (2007), we show that superadditivity between one pair of goods can also introduce complementarity between competing pairs of goods. One implication is that lower prices can result from a merger between producers of goods that themselves offer no superadditivity.
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|Date of creation:||Nov 2016|
|Publication status:||published as Berry, Steven & Haile, Philip & Israel, Mark & Katz, Michael, 2017. "Complementarity without superadditivity," Economics Letters, Elsevier, vol. 151(C), pages 28-30.|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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- Economides, Nicholas & Salop, Steven C, 1992. "Competition and Integration among Complements, and Network Market Structure," Journal of Industrial Economics, Wiley Blackwell, vol. 40(1), pages 105-123, March.
- Joshua S. Gans & Stephen P. King, 2006. "PAYING FOR LOYALTY: PRODUCT BUNDLING IN OLIGOPOLY -super-," Journal of Industrial Economics, Wiley Blackwell, vol. 54(1), pages 43-62, 03.
- Matthew Gentzkow, 2007. "Valuing New Goods in a Model with Complementarity: Online Newspapers," American Economic Review, American Economic Association, vol. 97(3), pages 713-744, June.
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