Serum urate among Ashkenazim
I am, alas, up to my eyeballs in study ideas with little patience or ability to carry them out. Here’s one such idea.
Ashkenazi Jews have high intelligence (IQ ~110) but their achievement is in excess of this. There is also some evidence for high psychological ‘intensity’ among Ashkenazim, and for high levels of serum urate. In the study of Erdberg, Boner, van Dyk and Carel (1991; http://www.karger.com/Article/Abstract/186728), Ashenazi patients with insulin-dependent diabetes mellitus and controls had significantly (p < 0.05) higher levels of serum urate than Sephardics. This suggests to me that Ashkenazim have high serum urate levels, which may explain their achievement and intensity (serum urate is a psychostimulant and correlates with high academic achievement when controlling for g). What do you think?