David A. Argue, Principal and Corporate Vice President of Economists Incorporated (EI), was the expert witness on liability on behalf of UnitedHealth Group, Inc. and PacifiCare Health Systems. Plaintiff Omnicare, Inc. alleged that a conspiracy could be inferred between United and PacifiCare. Dr. Argue reasoned that the defendants’ conduct was consistent with independent actions, and the U.S. District Court Judge granted summary judgment on the same basis. The defendants were represented by Robins, Kaplan, Miller & Ciresi L.L.P. and Hogan & Hartson. Dr. Argue was assisted by EI Vice President John M. Gale and EI Senior Vice President Kent W Mikkelsen. Click here to read the summary judgment opinion.