We investigate a spatial duopoly in which the firms simultaneously select locations at the beginning of time; once chosen, the locations are fixed forever, but the firms will choose prices in each of a countably infinite succession of time periods. We are interested in equilibrium behavior when...

In this article I investigate three single-shot models of differentiated-products oligopoly. In each model firms choose both output and price. The demand, cost, and spillover demand specifications are quite general, and there are three main results. First, with simultaneous choice there is no...

We study a model that involves identity-dependent, asymmetric negative external effects. Willingness to pay, which can be computed only in equilibrium, will reflect, besides private valuations, also preemptive incentives stemming from the desire to minimize the negative externalities. We find...

We study partnership dissolution when valuations are interdependent and only one party is informed. In contrast with the case of private values (Cramton, Gibbons, and Klemperer, 1987), in which efficient trade is feasible whenever initial shares are about equal, there exists a wide class of...

We study an auction whose outcome influences the future interaction among agents. The impact of that interaction on agent i is assumed to be a function of all agents' types (which are private information at the time of the auction). Explicit illustrations treat auctions of patents and takeover...

In standard auctions, collusion among buyers eliminates bidding competition despite informational asymmetries. Collusion can, however, be imperfect when the situation involves "externalities" among buyers, that is, when a buyer is worse off if one rival wins the good rather than if nobody gets...