Collected works of Robert A. Gordon
Robert (Bob) Arthur Gordon (born August 10, 1932, so age 90 as of writing) is an American sociologist notable enough to have a short Wikipedia page (well for now). He…
Cognitive and income inequality: the relationship that wasn’t
The theoretical prediction seems straightforward. If income is a function of intelligence (and other factors), then all else equal, a country with more inequality in intelligence will have more inequality…
The worldwide prison rates mystery
I regret to inform you that they are at it again. That is, blocking me on Twitter for the wrong ideas. It started benignly, as it usually does, with a…
How many people get arrested?
A friend of mine sent me this article for evaluation. Basically he thought the findings were too wild to be believed: Brame, R., Bushway, S. D., Paternoster, R., & Turner,…
African IQs using only age heaping data
Age heaping is a fascinating method. I blogged about it back in 2015, hoping that someone would take up the idea of fusing this literature from historical economics with modern…
Buj (1981) is probably fraudulent and shouldn’t be used
There's an odd old paper sometimes mentioned and even worse, used for calculations: Buj, Vinko. (1981). Average IQ values in various European countries. Personality and Individual Differences, 2(2), 168-169. Paper…
The Mensa fallacy
Back in 2015 at ISIR, a researcher gave a presentation about mental illness and intelligence, reporting it was elevated at high intelligence levels, along with all kinds of other issues.…
African IQs without African IQs: it’s complicated
Noah Carl has recently written about the African IQs debate, basically defending the usual numbers. Aside from arguing that the data are good enough to use, though obviously not perfect,…
Book review: At Our Wits’ End (Ed Dutton, Michael Woodley, 2018)
I try to read many different kinds of books each year. Outside of my own fields, I try to consume high quality popular science, but mainly read academic books within…
Italian north-south genetic differences confirmed
Davide Piffer and Richard Lynn has a new study out: Piffer, D., & Lynn, R. (2022). In Italy, North-South Differences in Student Performance Are Mirrored by Differences in Polygenic Scores…
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