Collusion Sustainability with Multimarket Contacts: Revisiting HHI Tests
AbstractOur paper focuses on the relationship between market concentration and collusion sustainability in a framework of multimarket contacts. We consider two independent and symmetric markets in which a subset of firms are active in both markets. When firms are able to transfer market power from one market to another, firms have strong incentives to collude even in a highly competitive market. This result is relevant for competition policy since assessing market concentration using HHI index could be misleading in some situations.
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Bibliographic InfoPaper provided by LAMETA, Universtiy of Montpellier in its series Working Papers with number 09-05.
Length: 15 pages
Date of creation: Mar 2009
Date of revision: Mar 2009
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