[8][9] During this period, in 2003, he served for 8 weeks as Interim Senior Vice President for Health Affairs as well as in his role as Provost.
[14] In 2021, Phelps, with coauthor Guru Madhavan, PhD,[15] analyzed the use of multi-criteria decision analysis (MCDA) models.
[17] In 2024, Phelps, with coauthor Darius Lakdawalla, PhD, published Valuing Health: The Generalized Risk-Adjusted Cost Effectiveness (GRACE) Model.
[22] Since 2012, he has been a Non-Resident Senior Fellow at the Leonard D. Schaeffer Center for Health Policy and Economics at the University of Southern California.
[25] From 2017-2018, he was a member of the ISPOR Special Task Force on "A Health Economics Approach to US Value Assessment Frameworks, authoring or coauthoring three of their seven reports.
Phelps is the only person ever to receive lifetime achievement awards from the two most-prominent health economics professional organizations in the world.
[34] Phelps participated from 1997 to 2007 in the Association of American Universities' Committee on Digital Technology and Intellectual Property Rights.
He also testified, in July 2005, on patent reform for the Senate Judiciary Committee's Subcommittee on Intellectual Property.
[40] Dr. Phelps married Dale Lee King, MD, a resident of Long Beach CA and fellow Pomona College student, on September 2, 1967.