Data on Gender Differences

There's not much point in my writing substantially about the Summers flap, since Mrs. McArdle has already covered all the important points, with help from Mar.Kleiman.

For those actually interested in the data, most of the relevant work was done by Julian Stanley's Study of Mathematically Precocious Youth, at Johns Hopkins University. SMPY and its offshoots have continued their curious mix of study of, and assistance for, the precocious; an interesting follow-on study is here.