We study a two-period model of behavior-based price discrimination in Fudenberg and Tirole (2000) but allow firms to make product choice in the first period. We show that the only possible equilibrium involves maximal differentiation. This is in contrast to Choe et al. (2018) where equilibrium...

The "spokes model" takes the name from its graphical visualisation, that resembles the spokes of a bike's wheel. It describes a market as a collection of spokes, joining at a common centre, where consumers are located. Firms may be situated at the extreme of these spokes, at the interior of the...

Using U.S. NETS data, we present evidence that the positive trend observed in national product-market concentration between 1990 and 2014 becomes a negative trend when we focus on measures of local concentration. We document diverging trends for several geographic definitions of local markets....

We investigate the decision of entry timing and product positions under market size uncertainty with Brownian motion for continuous-time spatial duopoly competition. We show the following results. First, the leader is more likely to increase the degree of product differentiation as volatility...

We study the relationship between market size and a number of firms in several healthcare professions in Slovakia to provide a new evidence about their entry decisions and a toughness of competition in the market. The size of a local market to support the entry of the first general practitioner...