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...

Using a duopoly model with symmetric retailers, we show that retailer strategies regarding opening hours and quality choices of goods vary depending on the cost structure of the quality investment in goods. In the case of the cost remaining constant regardless of the length of opening hours, a...

We investigate the social desirability of free entry in the co-opetition model in which firms compete in a homogeneous product market while sharing common property resources that affect market size or consumers' willingness to pay for products. We show that free entry leads to socially excessive...

This paper investigates regulation by auctions of private supply of congestible infrastructures in two networks settings: 1) two serial facilities, where the consumer has to use both in order to consume; and 2) two parallel facilities that are imperfect substitutes. There are four market...

In this paper, we characterize optimal environmental policy in a case where innovation in clean production technologies is developed and provided by a monopoly. Two policy instruments are considered: an emission tax on downstream polluting firms and an R& D subsidy for an upstream innovator in...

The number of firms and the wage inequality increased in U.S. manufacturing industries after the late 1970s and early 1980s, when the so-called "Carter/Reagan deregulation" was implemented. This paper provides a possible theoretical explanation for this observed relationship between the number...

The ongoing restructuring of the electricity sectors in many countries raises the policy question of to what extent the public generating assets should be privatized and what the objective function of any remaining public generation companies should be. We analyze the optimal regulatory policy...

This paper presents results from a calibrated welfare model of the UK mobile telephony market which includes many mobile networks; calls to and from the fixed network; networkbased price discrimination; and call externalities. The analysis focuses on the short-run effects of adopting lower...

Behavioural and industrial economists have argued that, because of cognitive limitations, consumers are liable to make sub-optimal choices in complex decision problems. Firms can exploit these limitations by introducing spurious complexity into tariff structures, weakening price competition....

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...