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The B.E. Journal of Economic Analysis & Policy

Editor-in-Chief: Jürges, Hendrik / Ludwig, Sandra

Ed. by Auriol , Emmanuelle / Brunner, Johann / Fleck, Robert / Friebel, Guido / Requate, Till / Tsui, Kevin / Wichardt, Philipp / Zulehner, Christine

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Vertical Mergers and Competition with a Regulated Bottleneck Monopoly

Alexander Galetovic1 / Ricardo Sanhueza2

1Universidad de los Andes,

2Universidad de los Andes,

Citation Information: The B.E. Journal of Economic Analysis & Policy. Volume 9, Issue 1, ISSN (Online) 1935-1682, DOI: 10.2202/1935-1682.2105, October 2009

Publication History

Published Online:
2009-10-28

Abstract

Consider a bottleneck monopoly whose access charge is regulated above marginal cost and produces an essential input used by an oligopoly of downstream firms. Should the monopolist be allowed to vertically integrate into the downstream market? Policy makers often argue that the vertically integrated subsidiary enjoys an undue advantage, because it receives access at marginal cost. We show that there is no undue advantage.With perfect competition downstream vertical integration is irrelevant because the subsidiary substitutes downstream output one-to-one and faces a per-unit opportunity cost equal to the access charge.With an oligopoly consumers and the bottleneck monopoly gain with vertical integration. By contrast, competitors lose oligopolistic rents. Social welfare increases, unless output is redistributed towards a very inefficient vertically integrated firm.

Keywords: access charge; network industries; oligopoly; stability

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