“…In the United States alone, these interventions include Medicaid (Currie and Gruber, 1996a;Dafny and Gruber, 2005;Baicker et al, 2013;Finkelstein et al, 2012;Taubman et al, 2014;Tello-Trillo, 2016), Medicare (Lichtenberg, 2002;Card et al, 2008), the Massachusetts universal coverage initiative (Miller, 2012a;Kolstad and Kowalski, 2012;Van der Wees et al, 2013), the 2010 expansion of coverage to young adults under the ACA (Sommers et al, 2013;Antwi et al, 2015; Barbaresco et al, 2015) and the various ACA provisions that took effect in 2014 (Sommers et al, 2015;Courtemanche et al, 2017b;Simon et al, 2017;Miller and Wherry 2017). 3 Whether increased utilization actually results in better health outcomes of patients is, however, still an open question.…”