We propose both a monopoly and a duopoly model of a two-sided market. Both settings are fully comparable, as we impose a homogeneous good produced at zero costs without capacity constraints, as well as identical parameterization of market sizes. We determine the duopoly equilibrium and the...

We make a case for price-increasing competition on “competitive bottleneck” two-sided markets. Unlike previous literature on price-increasing competition and two-sided markets, we abstract from product/platform differentiation, structural differences, scale effects, search costs, and...

The literature on the effects of market concentration in platform industries or two-sided markets often compares the competitive outcome against a benchmark. This benchmark is either the “joint management” solution in which one decision maker runs all platforms or a “pure” monopoly with...

We study the effect of distortionary taxes on three types of market structure: Cournot duopoly, Stackelberg duopoly, and a monopoly under a collusive agreement between the two rival firms in the industry. We investigate different tax regimes such as a per unit tax, an ad valorem tax and a tax on...

We study pricing by multiproduct firms in the context of unregulated monopoly, regulated monopoly and Cournot oligopoly. Using the concept of consumer surplus as a function of quantities (rather than prices), we present simple formulas for optimal prices and show that Cournot equilibrium exists...

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 multi-product firm. We analyse whether pruning...

It is usually believed that higher competition, implying more active firms, benefits consumers. We show that this may not be the case in an industry with asymmetric cost firms. A rise in the number of more cost inefficient firms makes the consumers worse-off in the presence of a welfare...

This paper reformulates and simplifies a recent model by Heidhues and Koszegi (2005), which in turn is based on a behavioral model due to Koszegi and Rabin (2006). The model analyzes optimal pricing when consumers are loss averse in the sense that an unexpected price hike lowers their...

Does free entry result in the socially preferred order of market entry for heterogeneous firms? This paper examines the welfare effects of sequential market entry by using a simple entry-deterrence model with heterogeneities in fixed and variable production costs among firms. In particular, we...

We study general discrete-types multidimensional screening without any noticeable restrictions on valuations, using instead epsilon-relaxation of the incentive-compatibility constraints. Any active (becoming equality) constraint can be perceived as "envy" arc from one type to another, so the set...