This paper studies the efficient pricing of large-value payment systems in the presence of unobservable heterogeneity about banks' future payment volumes. It is shown that the optimal pricing scheme for a public monopoly system involves quantity discounts in the form of a decreasing marginal...

This Paper studies the efficient pricing of large-value payment systems in the presence of unobservable heterogeneity across banks. It is shown that the optimal pricing scheme for a public monopoly system involves quantity discounts in the form of a decreasing marginal fee. This is also true...

This paper studies the efficient pricing of large-value payment systems in the presence of unobservable heterogeneity about banks' future payment volumes. It is shown that the optimal pricing scheme for a public monopoly systems involves quantity discounts in the form of a decreasing marginal...

In this paper, we tackle the dilemma of pruning versus proliferation in a vertically differentiated oligopoly under the assumption that some firms collude and control both the range of variants for sale and their corresponding prices, likewise a multiproduct firm. We analyse whether pruning...

We prove that a sufficient condition for the core existence in a n-firm vertically differentiated market is that the qualities of firms' products are equally-spaced along the quality spectrum. This result contributes to see that a fully collusive agreement among firms in such markets is more...

While competition between firms producing substitutes is well understood, less is known about rivalry between complementors. We study the interaction between firms in markets with one-way essential complements. One good is essential to the use of the other but not vice versa, as arises with an...

This paper introduces a number of game-theoretic tools to model collusive agreements among firms in vertically differentiated markets. I firstly review some classical literature on collusion between two firms producing goods of exogenous different qualities. I then extend the analysis to a...

As many pupil find difficult to understand the initial explanations of duopoly (two firms in a market), this paper attempts to provide a simplified mathematical illustration with a numeric example about the basic explanation of duopoly presented by Antoine Augustin Cournot (1801-1877). This...

Consumers have bounded perception and treat similar goods as homogeneous. The interaction between this bias and the structure of firms is studied in a vertically differentiated duopoly with market entry. With fixed costs of quality, natural monopoly and entry deterrence occurs at lower entry...

We examine the strategic use of Corporate Social Responsibility (CSR) in imperfectly competitive markets. The level of CSR determines the weight a firm puts on consumer surplus in its objective function before it decides upon supply. First, we consider symmetric Cournot competition and show that...