We model strategic competition between product differentiated oligopolists in a market with privately informed buyers as an abstract game over market situations. In this game each firm's strategy space consists of a set of catalogs--and each catalog in turn consists of a set of products and...

We model strategic competition in a market with asymmetric information as a noncooperative game in which each firm competes for the business of a buyer of unknown type by offering the buyer a catalog of products and prices. The timing in our model is Stackelberg: in the first stage, given the...

Within the context of a single-unit, independent private values auction model, we show that if bidder types are multidimensional, then under the optimal auction exclusion of a positive measure of bidder types occur. The results complements Armstrong’s (1996) exclusion of types result.