Extracting the core of the abstract:<p>> .. We found that sex differences in personality, verbal abilities, episodic memory, and negative emotions are more pronounced ... [while] differences in sexual behavior, partner preferences, and math are smaller in countries with higher living conditions.<p>> Taken together, results indicate that more sex differences are larger, rather than smaller, in countries with higher living conditions ... [defined amongst other things by higher] gender equality, and education.<p>I haven't read through the whole thing yet, but so far my takeaway is that higher living conditions and gender equality promote some (innate?) gender differences, which are diminished (hidden?) when living conditions are lower. This rings true to me.