“…The expanding mortality gap between high school dropouts and the more educated may simply reflect the increasing selectivity of the dropout group, not any underlying change in the relationship between SES and 1 Munnell (2015). 2 See, for example, Aaron and Burtless (2013), Panis et al (2002), Leonesio, Vaughn, and Wixon (2003), Weller (2005), Haverstick et al (2007), Turner (2007), Munnell and Libby (2007), Cutler (2009), Monk, Turner, and Zhivan (2010), and Cutler et al (2011). 3 The National Longitudinal Mortality Study began yearly collection in 1979. mortality.…”