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"In 2021, two meta-analyses on preference measurement in experimental economics find strong evidence for greater male variability for cooperation (variance ratio: 1.30, 95% CI [1.22, 1.38]), time preferences (1.15 [1.08, 1.22]), risk preferences (1.25 [1.13, 1.37]), dictator game offers (1.18 [1.12, 1.25]) and transfers in the trust game (1.28 [1.18, 1.38])."
Thöni, Christian; Volk, Stefan (2021-06-08). "Converging evidence for greater male variability in time, risk, and social preferences". Proceedings of the National Academy of Sciences. 118 (23): e2026112118. doi:10.1073/pnas.2026112118. ISSN 0027-8424. PMC 8201935. PMID 34088838.