In evolutionary biology, there is a hypothesis about sex ratios: Trivers-Williard hypothesis. It has been noted that males have higher dispersion in their fertility than females have, a finding that is also true in humans (one, two, three). If resources are related to fertility — which they are in many species and used to be […]

I don’t have time to do this project right now. However, since I gathered a bunch of relevant resources that I don’t want to have to re-find, I will write them down somewhere — here. My blog is my extended memory. Music genres are another fuzzy concept, like races. Lots of genres (and classification systems […]

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 […]

I was skimming a Wikipedia article related to immigrant crime and came across an obscure Swedish language report from the 1990s: Ahlberg, J. (1996). Invandrares och invandrares barns brottslighet: En statistisk analys [Immigrants’ and immigrants’ children’s crime: a statistical analysis]. Brottsförebyggande rådet (BRÅ). (file available on OSF) This report is a goldmine. Briefly: Data from […]

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. […]

(See 2015 post) There’s a very interesting new preprint out: Heterogeneity in polygenic scores for common human traits Erin B Ware, Lauren L Schmitz, Jessica D Faul, Arianna Gard, Colter Mitchell, Jennifer A Smith, Wei Zhao, David Weir, Sharon LR Kardia bioRxiv 106062; doi: This study investigates the creation of polygenic scores (PGS)s for […]

McCormick, G. L., Robbins, T. R., Cavigelli, S. A., & Langkilde, T. (2017). Ancestry trumps experience: Transgenerational but not early life stress affects the adult physiological stress response. Hormones and Behavior, 87, 115–121. Exposure to stressors can affect an organism’s physiology and behavior as well as that of its descendants (e.g. through maternal […]