Trivers-Willard in humans?
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…
Do music genres exist? An outline of an empirical approach
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…
Cold winter theory in non-human animals
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…
Getting personality right
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:…
Thinking about intergenerational stability of socioeconomic status
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,…
Swedish immigrant crime data from the 1980s
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…
New paper out: Immigrant crime in Germany 2012-2015
Kirkegaard, E. O. W., & Becker, D. (2017). Immigrant crime in Germany 2012-2015. Open Quantitative Sociology & Political Science. Retrieved from https://openpsych.net/paper/50 So the German paper is finally out. As…
On the validity of polygenic scores, in general and in Africans
(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…
Did a small lizard study show transgenerational epigenetics?
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…
How many associations are causal? How can we find out?
Gwern has discussed this before, but here's another take inspired by this Twitter exchange: https://twitter.com/KirkegaardEmil/status/827259356857004032 I envision the following way of finding out: Gather a large cross-sectional dataset of MZ…
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