Mattias Villani
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matvil.bsky.social
Mattias Villani
@matvil.bsky.social
Professor of Statistics at Stockholm University.
25+ years of Bayes and still excited.
Big fan of Julialang, Observable and Linux.
🇮🇹+🇸🇪
Well, at least before I got these crayons, apparently made out of angel tears.
November 1, 2025 at 12:36 PM
Photo of me after an intensive Bayes lecture at the blackboard.
November 1, 2025 at 12:32 PM
Dusting of my old Lenovo ThinkPad X220, bought 14 years ago.
Still snappy after a fresh Linux install!
#linux
August 11, 2025 at 10:09 AM
Took me many years before I learned the \phantom command in LaTeX, and its precision still brings me joy.

'The \phantom command creates a box with the same height, depth, and width as subformula, but empty.'

latexref.xyz/_005cphantom...
April 24, 2025 at 6:47 PM
I know, it's only Taylor approximations (but I like it).

observablehq.com/@mattiasvill...
April 15, 2025 at 6:45 PM
Immensely sad that Herman has passed away.
He took me into the Bayesian community at the Valencia meeting in 1998. Very encouraging discussant of my thesis. Always helping the younger and willing to share his time and knowledge.
He will be missed by many.

Obituary:
esobe.org/Herman_van_D...
January 30, 2025 at 11:03 AM
Wikipedia is the internet at its best.
If you can, please consider donating at:

donate.wikimedia.org/wiki/Special...
January 26, 2025 at 12:56 PM
Illustration of linear regression with time-varying parameters.

observablehq.com/@mattiasvill...
December 8, 2024 at 11:43 AM
Wrote a basic tutorial about state-space models and Kalman filtering, sprinkled with interactivity, for an intermediate stats course.

statisticssu.github.io/STM/tutorial...
January 1, 2024 at 1:06 PM
October 21, 2023 at 9:34 PM
Bayesian analysis of Multinomial data using a Dirichlet prior with javascript in observablehq.com

observablehq.com/@mattiasvill...
October 7, 2023 at 1:23 PM
Trying to guide my students in a first course in stats (SDA1) on how to choose a distribution depending on properties of the data (among the ones covered by our triplet of basic courses SDA1-3).
October 3, 2023 at 10:40 AM
Very happy to have Antonietta Mira visiting our department on October 20! All welcome!
September 29, 2023 at 1:08 PM
Wrote a tutorial for a basic course on how to compute maximum likelihood estimators with approximate standard errors in R. Sprinkled with some #observablehq interactivity.
statisticssu.github.io/STM/tutorial...
September 20, 2023 at 10:59 AM