Erik Ringen
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err-ring.bsky.social
Erik Ringen
@err-ring.bsky.social
Principal Data Scientist @ PyMC Labs

PhD in Bio-Anth. Behavioral ecology, phylogenetics, statistics & causal inference.

https://erikringen.github.io/
"For you, intelligence is not one thing among many. Every day it devours everything. It would like to put an end to a new state of society every morning." 1/n
October 7, 2025 at 8:49 AM
Reposted by Erik Ringen
Postdoc position open in Zurich -- Prof. Martin Tomasik and I have a joint SNF project on interpretable neural network approaches for large scale, complex item / temporal structure, online learning / cognitive development data.

Please retweet.

tinyurl.com/PostdocGNNSNF
May 28, 2025 at 11:16 AM
Reposted by Erik Ringen
I’m not sure I’ve ever seen something so simultaneously absurd and disturbing: the House will vote
Monday on a bill that would punish Americans for participating in boycotts of Israel with fines of up to $1 MILLION or prison terms up to TWENTY YEARS.
May 3, 2025 at 11:46 AM
Excited to share that I’ve started a new role as Principal Data Scientist with @pymc-labs.bsky.social. I’m working with and learning from an amazing group of people to do applied Bayesian modeling and advance open-source @pymc.io libraries.
April 5, 2025 at 1:35 PM
Reposted by Erik Ringen
OK, here is a very rough draft of a tutorial for #Bayesian #SEM using #brms for #rstats. It needs work, polish, has a lot of questions in it, and I need to add a references section. But, I think a lot of folk will find this useful, so.... jebyrnes.github.io/bayesian_sem... (use issues for comments!)
Full Luxury Bayesian Structural Equation Modeling with brms
jebyrnes.github.io
December 21, 2024 at 7:49 PM
Reposted by Erik Ringen
Ah, I found what I was looking for! From Imai et al.'s "Unpacking the Black Box of Causality" (2011). This is coming from the angle of two experiments in which you identify A -> B and B -> C and why you cannot infer the average causal mediation effect from that.
December 6, 2024 at 3:24 PM
Reposted by Erik Ringen
🚨 JOB ALERT!! We're looking for a PhD student to join our group! Are you interested in evolutionary medicine / anthropology? Already have a master's? Apply with your own project ideas! See link: jobs.uzh.ch/job-vacancie... #EvMed @bioanth.org @ehbea.bsky.social Please RT!
UZH: PhD position in evolutionary anthropology and medicine
The Human Ecology Group of the Institute of Evolutionary Medicine (IEM) Institute of Evolutionary Medicine at the University of Zurich, led by Prof. Adrian Jaeggi, is inviting applications from prospe...
jobs.uzh.ch
December 2, 2024 at 1:10 PM
Reposted by Erik Ringen
Our JSS article is out!

And now I get to focus on {marginaleffects} 1.0.0. Stay tuned.

www.jstatsoft.org/article/view...
December 1, 2024 at 11:00 PM
Reposted by Erik Ringen
Prior specification is one of the hardest tasks in Bayesian modeling.

In our new paper, we (Florence Bockting, @stefanradev.bsky.social and me) develop a method for expert prior elicitation using generative neural networks and simulation-based learning.

arxiv.org/abs/2411.15826
Expert-elicitation method for non-parametric joint priors using normalizing flows
We propose an expert-elicitation method for learning non-parametric joint prior distributions using normalizing flows. Normalizing flows are a class of generative models that enable exact, single-step...
arxiv.org
November 26, 2024 at 7:11 AM
Reposted by Erik Ringen
Our updated EcoEvoRxiv preprint "Estimating (non)linear selection on reaction norms: A general framework for labile traits" is now live. Work done in collaboration with Yimen Araya-Ajoy, Niels Dingemanse, @ali--wilson.bsky.social, and David Westneat. ecoevorxiv.org/repository/v...
November 26, 2024 at 11:26 AM
Conversely, the tools of “exploratory” data analysis lend more credibility and clarity to scientific claims than statistical testing ever could.
Insofar as the goal of science is to learn something about the world beyond the data at hand, I think the idea of hypothesis tests as being “confirmatory” makes us think we’ve learned more than we actually have.
November 24, 2024 at 6:33 PM
Reposted by Erik Ringen
𝚝𝚒𝚗𝚢𝚝𝚊𝚋𝚕𝚎 0.6.1 for #Rstats is out!

It's an ultra simple, super flexible, and 0-dependency package to draw beautiful tables in HTML, LaTeX, Typst, Word, PDF, and PNG.

And for those who ❤️ documentation, 𝚝𝚒𝚗𝚢𝚝𝚊𝚋𝚕𝚎 ships with a billion pages of tutorials:

vincentarelbundock.github.io/tinytable/
November 21, 2024 at 2:38 PM
New blog post (and uh, new blog!)

If you use observation-level random effects (e.g., for over-dispersed counts), your predictive checks are probably wrong. Here's how to do it the right way in both #brms and #PyMC.

tl;dr: you need to sample new levels of the OLRE to avoid a false goodness-of-fit
The right way to do predictive checks with observation-level random effects – Erik J. Ringen, PhD
erikringen.github.io
November 18, 2024 at 8:50 AM
This primer on between/within effects (using Mundlak device) is the paper I pull-up more often than any other during stats consultations. Better approaches exist (latent mean centering) but the explanations and figures here are top notch.

www.sciencedirect.com/science/arti...
September 25, 2023 at 12:50 PM
Teaching statistics to grad students this semester. Reading Freedman's anti-regression piece "Statistical Models and Shoe Leather" (paper brought to my attention by @edhagen.net) next week to calibrate expectations. Tag urself on his ordinal scale of pessimism.
September 22, 2023 at 1:28 PM