Fitting an increasingly clear pattern, sex differences in numeracy were larger in countries with the most egalitarian pattern of gender relations. http://discovery.ucl.ac.uk/10055384/1/Cook_10055384_thesis.pdf …pic.twitter.com/4knozvsbn7
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The Nordic countries tend to fit the pattern in other ways too. They have the largest sex differences in waist-to-hip ratio too, for example.
They fit into the general pattern of gender egalitarianism be linked to lager sex differences, they are just the most advanced example.
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