Top universities and national intelligence
We all know that universities differ in quality. But what exactly do we mean by that? How do we determine which are the top universities? There are a number of…
Consequences of racial composition changes in USA 1970-2023
Some years ago, I gave a good idea of a study to a friend, and he did it. But then he just never published his study anywhere, it's just sitting…
Does driver’s license training work?
Countries (and subnational divisions within some countries) differ quite a bit in how difficult it is to obtain a driver's license. The requirements here parallel those seen for various kinds…
The issue with early interventions for cognitive traits
There are numerous intervention studies aim at improving cognitive traits. While one can aggregate these in ways that give the appearance of impact, when looked at properly they don't really…
Against the economists on school spending
Some days ago I posted a chart about school spending (per-pupil spending) and math test scores: Note how I didn't say this cross-sectional scatterplot proves anything about causality, but we…
Newest results in ‘deep roots’ in the Americas
I am currently collecting reader questions from paid subscribers. Ask your questions here (or email me at emilowk@proton.me). While we wait for our upcoming Admixture in the Americas 2.0 (maybe…
Female education and fertility rates
This figure has been floating around on X the last few days: As in my own example, the copycat gained more attention than the earlier post (July 3rd 1.2M views,…
The racism of teachers
This is the 1601st post on this blog since 2007 (I regret not seeing the counter was at 1599 yesterday!). That's kinda crazy to think about. In about 2.5 years…
It doesn’t matter whether refugees are in the same classroom
Back in 2018, I wrote about classroom separation studies. It's one clever way to use the already existing twin data to examine specific environmental causes. Many people will claim that…
The Polgár sisters success story
The essence of my pedagogical program is that in my opinion, every healthy child can be raised to be an outstanding person, in my words, a genius. When we began…
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