🔥 StanCon 2026 Early Bird deadline today (AoE) 🔥 discourse.mc-stan.org/t/stancon-20...

StanCon 2026 deadline today! (AoE)

Hi all, Today is the last day to register for StanCon 2026 at the early-bird rate and order the StanCon 2026 t-shirt. We hope to see you all in Uppsala from the 17th to the 21st of August! More info...

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Having seen the submitted talks and posters, StanCon 2026 is going to be awesome!

Måns Magnusson@mansmag.bsky.social · 2mo ago

🔥 The early-bird deadline for StanCon 2026 (and, even more importantly, the StanCon Uppsala T-shirt) is in one week! 🔥 More information can be found here: discourse.mc-stan.org/t/stancon-20...

Trevor Campbell, Jonathan H. Huggins, Kyurae Kim, Charles C. Margossian: Large-scale empirical tuning and comparison of default optimizers for variational inference https://arxiv.org/abs/2606.07841 https://arxiv.org/pdf/2606.07841 https://arxiv.org/html/2606.07841

Two recommendations for cmdstanr in case studies: 1) use sample(..., refresh=0) to avoid 80 lines of MCMC progress reporting 2) cmdstanr::print_stan_file() in Quarto with output asis to get color formatting ``` #| output: asis print_stan_file(stan_file) ``` e.g., avehtari.github.io/Bayesian-Wor...

StanCon tutorials: 1) Full-day introduction to applied Bayesian statistics with Stan: fundamentals of Bayesian inference and the Bayesian workflow, Stan ecosystem by Mitzi Morris

🔥 The early-bird deadline for StanCon 2026 (and, even more importantly, the StanCon Uppsala T-shirt) is in one week! 🔥 More information can be found here: discourse.mc-stan.org/t/stancon-20...

StanCon 2026: Early bird (and t-shirt) deadline in one week!

Hi all! Also, the 10th of June (AoE) is the early-bird deadline, and after that, the conference fee will increase! Also, only those who register before the 10th of June will be able to buy a StanCon ...

discourse.mc-stan.org

CmdStan 2.39 has been released! - embedded Laplace approximation - new yule_simon distribution - gamma_lccdf more stable - optimization convergence status in output - length-1 tuples See more at blog.mc-stan.org/2026/05/19/r...

🔥 StanCon poster deadline and early bird deadline is coming up 🔥 discourse.mc-stan.org/t/stancon-20... @mc-stan.org @avehtari.bsky.social

Stancon 2026: Poster presentation deadline the 27th of May and Early Bird the 10th of June

Hi all! Just a reminder that the last program deadline for StanCon is coming up. The 27th of May is the last deadline for poster presentations. Also, the 10th of June is the early-bird deadline, and...

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In "Uncertainty in Bayesian leave-one-out cross-validation based model comparison" doi.org/10.1214/25-B... we showed when LOO-CV elpd_diff and se_diff normal approximation uncertainty quantification in model comparison is well calibrated. We have now merged a related PR to loo R package 1/

Have you ever read the Sherwood, Webb et al 2020 assessment of ECS and thought "I'd love to play with the numbers if only it didn't take 1 day to sample the posterior?" Rejoice! I've implemented the model in @mc-stan.org, and it now runs in ~1 minute. You can even run it in Google colab: 1/

If you have benefited from Stan, you can contribute back to the project also by nominating yourself to be part of Stan Governing Body (you don't need to be a developer) discourse.mc-stan.org/t/elections-...

Elections for Stan Governing Body 2026

We’re renewing the Stan Governing Body (SGB) with 2 seats up for grabs (I’m continuing my 2-year term). Current SGB members may still run, however they are not guaranteed to preserve their seats. As i...

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🔥 Announcing the last tutorial on Stancon 2026 🔥 discourse.mc-stan.org/t/announcing...

Announcing the last tutorial of StanCon 2026

We are happy to announce the last workshop at StanCon 2026 in August! Contributing to Stan: A Developer’s Guide to the Core, Interfaces, and First Contributions Would you like to contribute a new fe...

discourse.mc-stan.org

🔥 Announcing StanCon 2026 Program 🔥 Now we have a program for StanCon 2026 in Uppsala in August 17-21! discourse.mc-stan.org/t/announcing...

Announcing the program for StanCon 2026!

Hi everybody! Now we have a program for StanCon 2026! We have a lot of excellent contributed talks, tutorials, workshops, and keynotes. The full program can be found here: The program may still be...

discourse.mc-stan.org

very early draft of the techniques we show-cased in class: fusaroli.github.io/AdvancedCogn...

I've made an R package for Bayesian Rasch #psychometrics with brms models, easyRaschBayes (on CRAN), implementing simple functions to create figures and tables with model fit metrics, etc. Attaching figures from conditional item infit, item-restscore with GK gamma, and the log-likelihood criterion.

Finally finished up a blog post on estimating Bradley–Terry models using brms. www.m-flynn.com/posts/2025-1...

🔥 We’re pleased to announce two confirmed tutorials for #StanCon2026 🔥 _An introduction to applied Bayesian statistics with Stan_ — Mitzi Morris _Bayesian model diagnostics: Workflows and software tools_ — Osvaldo Martin, Teemu Säilynoja, and Noa Kallioinen More info: stancon2026.org/tutorials/

New paper out in JOSS: “ArviZ: a modular and flexible library for exploratory analysis of Bayesian models” It covers the design principles behind ArviZ and the motivation for the refactoring in 1.0. joss.theoj.org/papers/10.21...

ArviZ: a modular and flexible library for exploratory analysis of Bayesian models

Martin et al., (2026). ArviZ: a modular and flexible library for exploratory analysis of Bayesian models. Journal of Open Source Software, 11(119), 9889, https://doi.org/10.21105/joss.09889

joss.theoj.org

ArviZ 1.0 brings a lot of new plotting functionality. Check our gallery for a glimpse of what's new: python.arviz.org/projects/plo...

ArviZ now has built-in tools for prior & likelihood sensitivity analysis via power-scaling! Instead of fitting multiple models with different priors, you fit once and use importance sampling to approximate the effect of perturbing the prior or likelihood.

First tentative draft of huge chapter on bayesian models of cognition for my Cognitive Modeling (in @mc-stan.org )course notes: fusaroli.github.io/AdvancedCogn... I'll probably need to split it, as I want to add models of sequential update and empirical data 😅

occARU: Bayesian (multispecies) occupancy models for ARU data using @mc-stan.org. Automated recording units (ARUs) like camera traps produce rich time series which warrant going beyond occupancy and focusing on detection rates. 1/n mhollanders.github.io/occARU/

New Cognitive Modeling in R and @mc-stan.org chapters up: hierarchical modeling and model comparison. Still not satisfied with the text, but I brought the code and concepts up to date (LOO-PIT even, altho' still an info dump). Comments are welcome! fusaroli.github.io/AdvancedCogn...

"Efficient Bayesian implementations of capture-recapture models with Stan" by @matthollanders.bsky.social discourse.mc-stan.org/t/bayesian-c...

We are happy to announce the second StanCon 2026 workshop: 🔥 Bayesian Inference for Sparsity-Promoting and Edge-Preserving Priors 🔥 More information on the workshop can be found here: www.janglaubitz.com/stancon2026 More info on Stancon 2026 in Uppsala can be found here: www.stancon2026.org

StanCon 2026 Workshop announcement: Bayesian Inference for Sparsity-Promoting and Edge-Preserving Priors in Probabilistic Programming

We’re happy to share the second accepted workshop at StanCon 2026 in Uppsala, Sweden! Bayesian Inference for Sparsity-Promoting and Edge-Preserving Priors in Probabilistic Programming This workshop ...

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Improved Stan language support in Emacs by Brian Ward discourse.mc-stan.org/t/setting-up... and in Neovim by Andrew Mascioli discourse.mc-stan.org/t/setting-up...

Setting up Emacs for Stan in 2026

It is easier than ever to set up Emacs for Stan development. Here’s a screen shot of the kind of thing you can expect: The entire init.el needed to get this behavior is below (excluding the theme,...

discourse.mc-stan.org

We hare happy to announce the first StanCon workshop: 🔥 Stan for pharmacometrics 🔥 discourse.mc-stan.org/t/stancon-20... More information on the workshop can be found here: stan4pmx2026.sciencesconf.org

I've made a geometrical model for disc golf putting with uncertainty in 2D angle and distance control. Based on the model, the putting angle accuracies of top PDGA MPO and FPO players are about 1° and 1.4°, respectively. See more at users.aalto.fi/~ave/casestu...

Now published in Collabra! online.ucpress.edu/collabra/art... Using test data from TwinLife (N=9,980, Culture Fair Test CFT 20-R), we show that Regularised Prediction and Poststratification yields IQ scores that differ by up to 19 IQ points (mean 4.19 pts) from those reported in the CFT 20-R manual

Taym@taymalsalti.bsky.social · last yr.

hurrah! a new preprint*! weee have DAGs! we have Total Survey Error**! WE have MrP (rebranded as RPP)! We have cool plots showing how even high quality random samples can benefit from a good weighting model! What else do you want?! With @ianhussey.bsky.social, @malte.the100.ci, & @ruben.the100.ci

🔥 Last Keynote for StanCon 2026 🔥 We are happy to present Mathew Kay (@mjskay.com) as a keynote at StanCon in Uppsala in August! More information here: discourse.mc-stan.org/t/announcing... @mc-stan.org

Announcing StanCon 2026 last keynote

We’re happy to share the last keynote speaker for StanCon 2026! StanCon 2026 will take place 17–21 August 2026 in Uppsala, Sweden - more details can be found at https://stancon2026.org Matthew Kay, ...

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