We examined the effect of a rating system on sellers' entry into and exit from platform markets with monopolistic competition. We explicitly introduced a parameter for rating accuracy and analyzed sellers with varying product qualities by introducing a logit-type monopolistic competition. We...

We examine how vertical separation affects the lobbying activities forthe access charge of essential facilities. First, when investigating a model where the number of new entrants is fixed, we find that vertical separation either increases or decreases the access charge, and that this depends on...

We provide a simple theoretical model to explain the mechanism wherebyprivatization of international airports can improve welfare. The model consists of a downstream (airline) duopoly with two inputs (landings at two airports) andtwo types of consumers. The airline companies compete...

We investigate a Stackelberg oligopoly model in which m leaders and N-m followers compete. We find an asymmetric welfare implication of the Stackelberg model. Introducing a small number of leaders into the Cournot model can reduce welfare. However, introducing a small number of followers into...

We investigate a mixed market in which a state-owned, welfare-maximizing public firm competes against profit-maximizing n domestic private firms and m foreign private firms. A circular city model with quantity-setting competition is employed. We find that the equilibrium location pattern depends...

We investigate the manner in which vertical separation affects lobbying activities as well as the access charges for essential facilities. We find that vertical separation either increases or decreases the access charge, and this depends on the relative efficiency between the incumbent and new...

We investigate endogenous timing in a mixed duopoly in a differentiated product market. We find that private leadership is better than public leadership from a social welfare perspective if the private firm is domestic, regardless of the degree of product differentiation. Nevertheless, the...

This paper investigates a location-quantity model in a circular city. Pal (1998) investigates a duopoly model and finds that an equidistant location pattern appears in equilibrium. Matsushima (2001a) investigates an n-firm oligopoly model and shows that, if the number of firms is even, another...

We examine incentives of bottleneck facility holders to manipulate access charge accounting in free entry downstream markets. We consider the situation wherein one firm holds an upstream bottleneck facility and new entrants use it at the regulated price (access fee) to provide final products....

The recent developments in information technology (IT) have enabled firms to employ personalized pricing. Should all firms employ personalized pricing even though the adaptation costs of such pricing strategies are not high? This paper theoretically demonstrates a situation in which all firms do...