An online shopping intermediary is an internet platform on which consumers and third-party sellers transact. Shopping intermediaries provide a search environment (e.g., search aids) to lower consumers’ search costs incurred when finding and evaluating sellers’ products. We study strategic...

We consider a theoretical setting in which firms carry multiple products and consumers incur evaluation costs, not only across firms, but also within firms. Consumers judiciously decide the number of firms to include in their consideration sets as well as how many products from those firms. This...