In many ways, my science — and my colleagues’ science — generally involves collecting evidence for obvious hypotheses that are mainly denied by leftist-leaning people (more precisely, egalitarian). Here’s a brief review. Stereotypes about major demographic groups are quite accurate Jussim of course already showed this, but since it’s still frequently denied, seems that we […]

Disclaimer: I did not read Rushton’s seminal book on the topic. I was only first recently able to obtain a complete electronic copy (i.e. not abridged version). I did in fact only skim this literature. I don’t have time to work on this, but I’d like others to do so, hence I put the labor […]

This post covers some stuff already covered by others, but more briefly. Two studies of interest: Riemann, R., Angleitner, A., & Strelau, J. (1997). Genetic and Environmental Influences on Personality: A Study of Twins Reared Together Using the Self- and Peer Report NEO-FFI Scales. Journal of Personality, 65(3), 449–475. Connelly, B. S., & Ones, […]

I read the following interesting paper: Braun, S. T., & Stuhler, J. (2016). The Transmission of Inequality Across Multiple Generations: Testing Recent Theories with Evidence from Germany. The Economic Journal, n/a-n/a. This paper shows that across multiple generations, the persistence of occupational and educational attainment in Germany is larger than estimates from two generations […]

Kirkegaard, E. O. W., & Becker, D. (2017). Immigrant crime in Germany 2012-2015. Open Quantitative Sociology & Political Science. Retrieved from So the German paper is finally out. As far as I know, this is the most extensive analysis of immigrant crime in Germany. Still, it is a quite simple analysis in some ways. […]

Woodley convinced me that these are of actual interest. As some of you may recall, I compiled a large county level (n≈3000) dataset some time ago, but didn’t use it for anything. I just thought it would be a cool dataset, but that results were not too interesting. Well, since someone did think these were […]

Whitley, E., Deary, I. J., Ritchie, S. J., Batty, G. D., Kumari, M., & Benzeval, M. (2016). Variations in cognitive abilities across the life course: Cross-sectional evidence from Understanding Society: The UK Household Longitudinal Study.Intelligence, 59, 39–50. Background Populations worldwide are aging. Cognitive decline is an important precursor of dementia, illness and death and, […]

I was working on a study and while doing so, I updated all my R packages. To my surprise, this changed the results in my analysis to a degree that it caused a change in the conclusion. I suspected it was due to an update in the psych package. The update notes read: Bug fixed […]