“…This work more generally relates to the huge literature on gender differences in decision making. Behavioural scientists have explored gender differences in several decisional domains, including competition (Gneezy & Rustichini, 2004;Niederle & Vesterlund, 2007;Gneezy, Leonard, & List, 2009), risk aversion (Byrnes, Miller, & Schafer, 1999), cooperation (Balliet, Li, Macfarlan, & Van Vugt, 2011;Rand, 2017), altruism (Eagly & Crowley, 1986;Engel, 2011;Rand et al 2016;Brañas-Garza et al 2018), honesty (Capraro, 2018;Abeler, Nosenzo, & Raymond, 2019;Gerlach, Teodorescu, & Hertwig, 2019), the equity-efficiency trade-off (Andreoni & Vesterlund, 2001;Dickinson and Tiefenthaler, 2002;Fehr, Naef and Schmidt, 2006;Stieglitz, Gurven, Kaplan, and Hopfensitz, 2017;Capraro, 2019), and harm aversion (Fumagalli et al 2010;Friesdorf, Conway, & Gawronski, 2015;Capraro & Sippel, 2017). Our work differs from these papers, in that it explores gender differences in the way people discriminate the two genders when they are in charge of punishing defectors or rewarding cooperation; this type of gender difference was not previously explored.…”