 Other criticisms focus on different, egalitarian-oriented justice concerns about morally contentious assumptions embedded in the measures, including whether to differentially value years saved in different stages of life and how to disvalue specific disabilities. Depending on how these and other assumptions are determined and specified, summary health measures have been criticized as being ageist or not ageist enough, as discriminating unfairly against people with disabilities, as failing to capture the moral uniqueness of lifesaving, and as treating as commensurable qualitatively different losses and benefits. (Brock 2002, 2006; Daniels 2008; Kappel and Sandoe 1992; Nord 2005; Powers and Faden 2006; Ubel 1999; Williams 2001; Whitehead and Ali 2010; Soares 2012; Pettit et al. 2016; Schroeder 2017).