“…Firstly, our identification strategy and the availability of granular administrative records allow us to measure the causal impact of more-skilled physicians on health outcomes. Previous literature has documented the relationships between health outcomes and physicians' diagnosis skills (Currie and MacLeod, 2020), physicians' teams (Chen, 2021), healthcare access (Almond et al, 2010;Finkelstein, Taubman, Wright, Bernstein, Gruber, Neuse, Allen, Baicker, and Group, 2012), 11 healthcare costs (Alsan, Garrick, and Graziani, 2019;Clemens and Gottlieb, 2014;Molitor, 2018), quality of physicians' academic institutions (Doyle et al, 2010), physicians' performance on qualifying examinations (Carrera, Goldman, Joyce, and Sood, 2018;Tamblyn, Abrahamowicz, Dauphinee, Hanley, Norcini, Girard, Grand'Maison, and Brailovsky, 2002;Wenghofer, Klass, Abrahamowicz, Dauphinee, Jacques, Smee, Blackmore, Winslade, Reidel, Bartman, et al, 2009), physicians' competence (Das, Holla, Mohpal, and Muralidharan, 2016) 12 , physicians' ability to facilitate adherence to prescription medications (Iizuka, 2012;Simeonova, Skipper, and Thingholm, 2020), physicians' fees and payment for performance (Basinga, Gertler, Binagwaho, Soucat, Sturdy, and Vermeersch, 2011;Ho and Pakes, 2014a,1), general practitioners and specialists (Baicker and Chandra, 2004), and physicians' communication (Curtis, Cai, Wade, Stolshek, Adams, Balasubramanian, Viswanathan, and Kallich, 2013). To our knowledge, this paper is the first to document experimental evidence on the impact of more skilled physicians on health outcomes.…”