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Antitrust and Trade Regulation

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Michigan Law Review

Collusion

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Full-Text Articles in Law and Economics

Plus Factors And Agreement In Antitrust Law, William E. Kovacic, Robert C. Marshall, Leslie M. Marx, Halbert L. White Dec 2011

Plus Factors And Agreement In Antitrust Law, William E. Kovacic, Robert C. Marshall, Leslie M. Marx, Halbert L. White

Michigan Law Review

Plus factors are economic actions and outcomes, above and beyond parallel conduct by oligopolistic firms, that are largely inconsistent with unilateral conduct but largely consistent with explicitly coordinated action. Possible plus factors are typically enumerated without any attempt to distinguish them in terms of a meaningful economic categorization or in terms of their probative strength for inferring collusion. In this Article, we provide a taxonomy for plus factors as well as a methodology for ranking plus factors in terms of their strength for inferring explicit collusion, the strongest of which are referred to as "super plus factors."


The Anticompetitive Effect Of Passive Investment, David Gilo Oct 2000

The Anticompetitive Effect Of Passive Investment, David Gilo

Michigan Law Review

There are many cases in which a firm passively invests in its competitor. For example, Microsoft passively invested in $150 million worth of the nonvoting stock of Apple, its historic rival in the operating systems market. Also, in November 1998, Northwest Airlines, the nation's fourth-largest airline, purchased 14% of the common stock of Continental Airlines Inc., the nation's fifth-largest (and fastest growing) airline. Northwest competes with Continental on seven routes, serving 3.6 million passengers per year. In another example, TCI, the nation's largest cable operator, became a passive investor with a 9% stake (which can be increased, under the terms …