Ben Bolker
@bbolker.bsky.social
2.1K followers 560 following 620 posts
Ecology, evolution, epidemiology, statistics (mixed models). McMaster University, Hamilton, Ontario
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bbolker.bsky.social
More seriously, I think much of the difference is between quantifying uncertainty by conditioning (profile likelihood curves etc.) and marginalizing (marginal posterior densities etc.)? (If anyone has pointers to nice discussions of this I'd appreciate it ...) [prior \approx regularization ...]
bbolker.bsky.social
Check the vroom package? (Also possibility of converting to parquet/arrow?)
bbolker.bsky.social
A polite query after 3 months sounds reasonable.
bbolker.bsky.social
Interesting. Earlier thread with pointers to similar refs (possibly all in your literature review/discussion sections, haven't checked yet ...) bsky.app/profile/bbol...
bbolker.bsky.social
Some possibly interesting/useful refs on socioeconomic barriers to success in academia ... comments welcome.

McClain 2025 doi.org/10.1371/jour...;
Morgan et al. 2022 doi.org/10.1038/s415...; Arbuckle et al 2025 doi.org/10.1111/jzo....; Wanelik et al 2020 doi.org/10.1002/ece3....
Figure 4 from Morgan et al 2022. Average income distribution estimated using faculty members’ childhood zip codes (green), compared with the income distribution across the 1998 US population (black). Two densities overlaid: both are skewed with a long/fat right tail. Black (US pop) peaks around $40K, median around $60K. Green (faculty) peaks at $50K, median around $70K.
bbolker.bsky.social
maybe fct_rev_infreq <- function(x) {
x |> factor() |> fct_infreq() |> fct_rev()
}
mutate(across(x, fct_rev_infreq))
?
bbolker.bsky.social
I think `mutate(across(x, ~forcats::fct_infreq(factor(x)))` might work? (although that puts most frequent grp first: not sure if there's an easy way to reverse). (It annoys me slightly that the forcats::fct_* functions don't have an option to convert their argument to factor automatically ...)
bbolker.bsky.social
Can't sign myself (not affected) but posting for visibility ...
bbolker.bsky.social
Hate to ask, but are you sure that the gamlss actually does *survey* weighting? Docs say only "weighted likelihood analysis where the contribution of the observations to the likelihood differs according to ‘weights’". Can't find anything informative online and don't want to dig into the code ...
bbolker.bsky.social
I think I joked once about people spreading Fear, Uncertainty and Doubt en.wikipedia.org/wiki/Fear,_u... about `lmer` -- lmer FUD ...
Fear, uncertainty, and doubt - Wikipedia
en.wikipedia.org
bbolker.bsky.social
"In view of what Professor and Mrs. Peckham have discovered regarding the habits of Ammophila in a bean patch, it may be that these wasps were busy during the day in the adjoining gardens and repaired at night to this patch of grass to rest and dream of big caterpillars ..."
bbolker.bsky.social
It helps that I'm 50% in the math&stats department (and hence regularly reminded of my inadequacy in, say, proving anything halfway rigorously)
Reposted by Ben Bolker
nmouquet.bsky.social
Very proud of this paper in BioScience :

« Too cute to be wild: what teddy bears reveal about our disconnection from nature »

🧸 are more than toys, they shape among our first emotional connections to nature. But their design may also distort how we see wildlife !

👉 doi.org/10.1093/bios...

🧪🦤
bbolker.bsky.social
I'm not really sure; in the frequentist world I think this would be called a penalty or regularization term. However, penalization/regularization is usually justified on grounds of reducing bias (e.g. Firth logistic reg) *or* mean squared error (e.g. ridge regression), not avoiding boundaries ...
bbolker.bsky.social
is there/will there be a preprint? Very interested in these methods ...
bbolker.bsky.social
haven't *all* propagated (in particular arm64 versions)
bbolker.bsky.social
Is it on the link/linear predictor scale or the response/data scale?
Reposted by Ben Bolker
marieaugermethe.bsky.social
Like to develop spatio-temporal models? Interested in Arctic marine mammals 🦭🐳 and their susceptibility to oil spills? You may be the postdoctoral fellow Dr. Mariane Marcoux and I are looking for! See the details in the job ad: tinyurl.com/spatiostatamm