“…The economic literature on competitiveness was initiated by papers that focused on documenting gender differences (Gneezy, Niederle, and Rustichini, 2003;Niederle and Vesterlund, 2007;Croson and Gneezy, 2009;Niederle and Vesterlund, 2011;Niederle, 2016;Dariel et al, 2017). Later studies have shown that competitiveness predicts career choices and labor market outcomes with competitive people sorting into more prestigious and higherpaid careers (Buser, Niederle, and Oosterbeek, 2014;Reuben, Sapienza, and Zingales, 2015;Buser, Niederle, and Oosterbeek, 2021;Buser, Peter, and Wolter, 2022;Lozano, Ranehill, and Reuben, 2022). Another large literature in behavioral and experimental economics studies the tendency of humans to be reciprocal.…”