The paper studies equilibria for economies with imperfect competition and non-convex technologies. Following Negishi firms maximise profits under downward-sloping perceived demand functions. Negishi's assumptions, in particular the assumption of a single monopolistic competitor in each market,...

In general equilibrium models with oligopolistic firms, equilibrium outcomes may depend on the choice of numeraire. When firms have the power to influence prices strategically, different price normalisations entail objective profit functions which are generally not monotone transformations of...

This paper analyzes sequential games of double-sided Bertrand competition in the deposit and credit markets, when banks are free to reject customers and cannot distinguish among borrowers. The timing of competition is crucial when customers apply once. Interest rates are pushed upwards when the...

[Forthcoming, American Economic Review.] We model a War of Attrition with N+K firms competing for N prizes. If firms must pay their full costs until the whole game ends, even after dropping out themselves (as in a standard-setting context), each firm's exit time is independent both of K and of...

This paper presents an alternative or enhanced approach to information acquisition in Cournot markets with stochastic demand in which the cost of information acquisition is endogenously determined by firms\222 information purchasing strategy. I propose a two-stage model in which in the first...

Roger Ransom and Richard Sutch's research on the social and institutional changes in the postbellum American South, summarized in their One Kind of Freedom, raised many controversies. One of them concerns the degree of competition among the advancing merchants of the rural South. Ransom and...

A simple Ising spin model which can describe the mechanism of advertising in a duopoly market is proposed. In contrast to other agent- based models, the influence does not flow inward from the surrounding neighbors to the center site, but spreads outward from the center to the neighbors. The...

We study the implementation of constrained-efficient allocations in labour markets where a basic coordination problem leads to an equilibrium matching function. We argue that these allocations can be achieved in equilibrium if wages are determined by ex post bidding. This holds true even in...

Recent developments in information technology (IT) have resulted in the collection of a vast amount of customer specific data. As the IT advances the quality of such information improves. We analyze a sequential spatial model of oligopolistic third degree price discrimination where the firms use...

We investigate how the endogenous acquisition of information, of a certain quality level, on consumers' willingness to pay (location) affects the equilibrium prices and welfare in a spatial price discrimination model. By varying the information quality we are able to obtain the equilibrium in...