In this paper, we present a model of endogenous vertical integration and horizontal differentiation. Thereexists two output brands and two versions of the input. The only mean for output differentiation is the inputversion used in output production. Firms may choose to vertically integrate to...

In this paper, we propose an example of successive oligopolies where the downstream firmsshare the same decreasing returns technology of the Cobb-Douglas type. We stress thedifferences between the conclusions obtained under this assumption and those resultingfrom the traditional example...

In this paper we analyze how the technology used by downstream firms can influence inputand output market prices. We show via an example that both these prices increase under adecreasing returns technology while the contrary holds when the technology is constant....