Is the Competitor of my Competitor also my Competitor?

Sandro Shelegia

Journal of Economics & Management Strategy, 2012, vol. 21, issue 4, 927-963

Abstract: This paper presents several results on multimarket competition. First, whenever a firm faces multimarket competitors that sell goods in markets to which the firm itself has no access, the firm gains a strong incentive to expand production in its own market(s). In the capacity choice model, such a firm builds larger than Cournot capacity and pushes its competitors towards other markets. Consumers always benefit from multimarket competition. In asymmetric market structures, some firms may also benefit from multimarket arrangements, but in symmetric ones, all firms are necessarily harmed by it. Second, the intensification of indirect competition is not necessarily bad for the firm. It may be the case that, the more competitors its competitors have, the higher the firm’s profit. Finally, this model also has a multiproduct interpretation which suggests that a merger of single‐product firms may be beneficial or harmful from a social welfare perspective, depending on whether the new entity will compete with several single‐product firms or another multiproduct one.

Date: 2012
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