> So there are slightly more males listed, at least in the sources I could find. But a difference of 10 out of 211 siblings with recorded sex, isn’t very large. I’m sure there are some statistics I could do to show it, but I don’t think that slight bias is sufficient to account for our observed birth order effect.
> So there are slightly more males listed, at least in the sources I could find. But a difference of 10 out of 211 siblings with recorded sex, isn’t very large. I’m sure there are some statistics I could do to show it, but I don’t think that slight bias is sufficient to account for our observed birth order effect.
Almost all of these mathematicians were male and the sex of successive siblings is [correlated](https://www.biorxiv.org/content/biorxiv/early/2015/11/12/031344.full.pdf). Combined with random variation, I don’t think we can conclude bias in this sample.