Judge Sullivan and the UPP: Much Ado About Nothing or Articulating the Real Problem with the New HMGs?

Much has been made of Judge Sullivan’s recent decision in City of New York v. Group Health Incorporated and its implications for the UPP test and market definition in merger cases under Section 7 of the Clayton Act.  Given the 2010 Proposed Horizontal Merger Guidelines’ (2010 HMGs) shift toward diversion ratios and margins and away from market shares, the blogosphere has sold Judge Sullivan’s decision as sign that the agencies might have a tough time selling the UPP to federal courts in the post-2010 HMG world.

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