Free speech for thee but not for me
Most countries have severe limitations on free speech. Historically, freer speech was a characteristic of western countries, but not so much anymore, with the exception of the United States. And…
Leftism, mental health, and visual presentation confirmed
So we did another study of leftism, mental health and visual presentation: Hu, M.,& Kirkegaard, E. O. W.(2026). Left-wing ideology, mental health and body modifications. Journal of Open Inquiry in…
Migration and feelings of safety in Denmark
A politician from the Social Democrats called Frederik Vad (center-left government party) posted results of a survey about how safe citizens report feeling in various areas of the country. There…
What really predicts fertility? A principled look at country time series data
We have an endless amount of articles trying to show that this or that variable is a plausible causal candidate, and hopefully something we can do something about practically speaking.…
American Jewish gentile differences
Jews are an extraordinarily successful ethnic group in almost everything they choose to engage in, from physics to politics with the curious exception of US presidencies. Seb Jensen compiled a…
Who is gaining Danish citizenship?
The Danish constitution says: §44 (1) No alien shall be naturalized except by statute. (2) The extent of the right of aliens to become owners of real property shall be…
Assessment of the Confidence Calibration Test + new test
Yesterday, I posted a new cognitive test on taketest.xyz, the Confidence Calibration Test. If you want to take the test without biased results, take it now before reading further. You…
Explaining Poland’s fertility paradox
You have probably seen this map: It regularly goes viral on X with the usual abortion debate to follow. The source is this site, where we can also learn that this…
Which countries are best at esports? 2026 update
Given the ease of obtaining scraped datasets with Claude Code, I thought we could update my 2019 study of mental sports with the newest data and better methods. The primary…
Do gun ownership predict homicides taking race into account?
You may have seen a plot like this one: The reader is left to interpret that guns cause homicides. It's correct if we include suicides but it's not true for…