This article provides an introduction to multimarket competition and the research stream that examines it. Multimarket competition occurs when firms meet their competitors in multiple markets and compete with them by coordinating their strategies across those markets. In this article, we present...

The paper investigates firms’ behavior and outcomes (levels of cost-reducing R&D, output, profit and welfare in equilibrium) in a differentiated duopoly with process innovation. One of the important features in this paper is that spillovers operate in the R&D stage and are tied to the degree...