Research on collusion in vertically differentiated markets is conducted under one or two potentially restrictive assumptions. Either there is a single industry-wide cartel or costs are assumed to be independent of quality or quantity. We explore the extent to which these assumptions are indeed...

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...

The strategy of product differentiation has been viewed as very important in the field of business administration, but it has not necessarily been viewed as an important source of large differences in firms’ profits in the field of economics. In this paper, this apparent contradiction is...

In online contents markets, content providers collect revenues from both consumers and advertisers by segmenting consumers who are willing to avoid advertisements and who are not. To analyze such situations, I construct a model of menu pricing by advertising platforms in two-sided markets. I...

The purpose of this paper is to consider if Amazon’s increase in private label brands is the tipping point for transforming the e-commerce giant into a monopoly. To lay the foundation, we initially explore the culture, leadership, and business practices which are unique to Amazon that enabled...

Using a static model of firm behaviour with imperfect competition on the product and labour markets, we quantify the effect of firm heterogeneity in total factor productivity, market power, capital, wages and prices on the aggregate labour share. In particular, we suggest a new decomposition of...

Can a monopoly persist by expanding its operation to a new market after strategically bidding for an exclusive license under the threat of supply function competition with a potential entrant? The answer may be yes or no depending on how the monopolist's existing product and the new product are...