In this paper we argue that two important causes of welfare losses in oligopolistic markets have been neglected. We show that in models where location is endogenous, welfare losses arising from wrong locations or from lack of market coverage may be substantial despite firms competing in prices....

We study an asymmetric duopoly market in which the firms' products are initially differentiated in both variety and quality. Each consumer has a most preferred variety and a quality valuation. Customization provides ideal varieties for consumers but has no effect on product qualities. The firms...

We study mass customization in a duopoly game in which the firms' products have different qualities. Whether customization choices are made simultaneously or sequentially is endogenously determined. Specifically, the customization stage of the game involves two periods. Each firm either selects...

We develop a model that is a synthesis of the two-sided markets duopoly model of Armstrong (2006) with the nested vertical and horizontal dierentiation model of Gabszewicz and Wauthy (2012), which consists of a linear city with dierent consumer densities on the left and on the right side of the...

We explore a variant of the Hotelling model which allows to nest horizontal and vertical differentiation into a unified setup whose key parameter is the relative natural market size of the firms. In this setup, equilibrium prices increase whenever population's disparity decreases. We also...

This paper establishes a duopoly model, which considers consumers’ preference exhibits the horizontal differentiation and vertical differentiation simultaneously, to investigate how counterfeiting affects firms’ market power and consumer's purchasing behavior. The effects of government...

This paper summarizes and evaluates recent research on food product quality and differentiation, both key dimensions of modern food markets. We emphasize the implications for modeling of violation of the product homogeneity and perfect information axioms of perfect competition and focus on...

Durable goods manufacturers often design product lines by segmenting their markets on quality attributes—attributes that exhibit a “more is better” property for all consumers. Since products within a product line are partial substitutes, and consumers can self-select the products they want...