Tacit versus overt collusion: Firm asymmetries and numbers: What's the evidence?

Davies, Stephen and Olczak, Matthew (2008) Tacit versus overt collusion: Firm asymmetries and numbers: What's the evidence? Competition Policy International, 4 (2). pp. 175-200.

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It is conventional wisdom that collusion is more likely the fewer firms there are in a market and the more symmetric they are. This is often theoretically justified in terms of a repeated non-cooperative game. Although that model fits more easily with tacit than overt collusion, the impression sometimes given is that one model fits all. Moreover, the empirical literature offers few stylized facts on the most simple of questions how few are few and how symmetric is symmetric? This paper attempts to fill this gap while also exploring the interface of tacit and overt collusion, albeit in an indirect way. First, it identifies the empirical model of tacit collusion that the European Commission appears to have employed in coordinated effects merger cases apparently only fairly symmetric duopolies fit the bill. Second, it shows that, intriguingly, the same story emerges from the quite different experimental literature on tacit collusion. This offers a stark contrast with the findings for a sample of prosecuted cartels; on average, these involve six members (often more) and size asymmetries among members are often considerable. The indirect nature of this evidence cautions against definitive conclusions; nevertheless, the contrast offers little comfort for those who believe that the same model does, more or less, fit all.

Item Type: Article
Faculty \ School: Faculty of Social Sciences > School of Economics
UEA Research Groups: Faculty of Social Sciences > Research Groups > Industrial Economics
Faculty of Social Sciences > Research Centres > Centre for Competition Policy
Related URLs:
Depositing User: Gina Neff
Date Deposited: 12 Apr 2011 15:17
Last Modified: 14 Aug 2023 11:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/29102

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