“…For DE, almost all observational studies report positive associations between participation and postsecondary outcomes, including college enrollment (Cowan & Goldhaber, 2015; Giani et al, 2014; Karp et al, 2007; Struhl & Vargas, 2012; Taylor, 2015), persistence (Allen & Dadgar, 2012; Giani et al, 2014; Hughes et al, 2012; Karp et al, 2007; Struhl & Vargas, 2012), and degree attainment (An, 2013; Blankenberger et al, 2017; Giani et al, 2014; Grubb et al, 2017; Karp et al, 2007; Struhl & Vargas, 2012; Taylor, 2015). 2 However, studies employing designs with stronger causal warrant have produced mixed results.…”