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Leonard Stimpfle

@leonardstimpfle.eurosky.social
117 followers 179 following 64 posts

PhD candidate at Ghent University. Interested in climate, OSS, Python and Rust.

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Reposted by Leonard Stimpfle
Terence Tao @teorth.bsky.social · 11/09/2026
A group of 25 Fields Medalists, including myself, have made a joint declaration on Math and AI: mathandai.org . We welcome additional signatories. See also this article in the Economist announcing the declaration: www.economist.com/science-and-...
mathandai.org
Declaration — Math and AI
Read the declaration and add your name.
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Glyph @glyph.im · 30/08/2026
the social contract that allows the web to exist at all is literally collapsing in real time people.kernel.org/monsieuricon/cree…
people.kernel.org
Creepy crawlies
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 19/08/2026
This @duckdb.org blog post illustrates this nicely duckdb.org/2024/11/22/r...
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 13/08/2026
These ratio outcome variables are a plague in the sciences. If your analysis treats 1/2 and 10/20 as the same evidence, then you have discarded uncertainty in the outcome. Model what you measure, not what you construct. Use the denominator as an exposure instead.
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Łukasz Langa @lukasz.langa.pl · 05/08/2026
You can help shape the future of #Python typing with the power of having an opinion! Fill out the annual Python Type System and Tooling Survey: www.surveymonkey.com/r/python_typ...
surveymonkey.com
Python Type System and Tooling Survey 2026
The Python Typing Survey offers a comprehensive look at the current state of Python’s type system and developer tooling. It captures the evolving sentiment, challenges, and opportunities around Python...
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Henry Yuen @henryyuen.bsky.social · 01/08/2026
Some initial thoughts, and a complicated mix of feelings. Wow. I mean, Erdos problems are cool (I genuinely mean that), I didn't know about the Jacobian conjecture before it got disproved. But this newest batch from OpenAI hits home in a way the previous announcements did not.
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Max Parzen @maxparzen.bsky.social · 17/05/2026
#Open grid data is a public good improving security and not a threat. Support by signing & sharing the petition. 🔗 to the petition: tally.so/r/xX08eE ➡️ blog by @nworbmot with details: nworbmot.org/blog/open-gr... ➡️ impact examples mapyourgrid.org/impact/ #freethemodels
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Paul Goldsmith-Pinkham @paulgp.com · 21/04/2026
Python implementation of `rdrobust` that is significantly faster! github.com/leostimpfle/... These runtimes are in logscale!!
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 20/04/2026
I have started to work on `pyrdd` for fast estimation of RDDs in Python. It is essentially a refactored `rdrobust` which is great but struggled with the data I was throwing at it and also seems incompatible with the newer versions of `numpy`. Some early benchmarks attached (note the log scale).
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Alex @s3alfisc.bsky.social · 23/03/2026
I am very excited that PyFixest 0.50.0 is on PyPi, including a new graph-based solver for demeaning that makes fixed effects estimation in PyFixest significantly faster for "sparse" fixed effects structures.
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Alex @s3alfisc.bsky.social · 03/01/2026
If you are aware of any other high quality implementations of "modern" estimators in Python, please let us know!
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Hanno Böck @hanno.hboeck.de · 30/12/2025
Was there a massive leak of a dangerous greenhouse gas in Iceland🇮🇸 in 2011-or was it a data📈 reporting error? Emission databases show that the Norðurál aluminium factory🏭 released 60 tons of SF₆ in 2011 — but no such emissions in any other year. 🔌💡 industrydecarbonization.com/news/errors-... 🧵
industrydecarbonization.com
Errors and Inconsistencies in European Emission Data
Factories that suddenly have emissions a thousand times lower than before, unexplained data gaps, and inconsistent CO₂ emissions from different data sources are some of the issues one finds when havin...
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 07/12/2025
The 2021 spike seems to be caused by low generation in the first three months (chart for the Rovinari power plant). Is something wrong with the reported time interval (ResolutionCode)? Any experts on the ENTSO-E generation data who know what might be going on? #EnergySky
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 07/12/2025
This is a great analysis on a very important topic. But are the emission factors driven by the numerator (emissions) or denominator (energy inputs)? A short investigation (cc @hanno.hboeck.de)
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Hanno Böck @hanno.hboeck.de · 27/11/2025
The UNFCCC makes it needlessly difficult to download emission data📊📈 The UNFCCC🇺🇳 is most famously known for being the organizer of the climate conferences (COPs). However, they also play an important role in collecting and managing emission data. 🔌💡 industrydecarbonization.com/news/why-is-... 🧵
industrydecarbonization.com
Why is it needlessly difficult to access UNFCCC Emission Data?
Due to international climate agreements, countries report annual data about their greenhouse gas emissions to the UNFCCC. However, downloading and using that data is a lot more difficult than it shoul...
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Steve Randy Waldman @interfluidity.com · 12/11/2025
[new draft post] Real purchasing power over time is not economic welfare over time drafts.interfluidity.com/2025/11/12…
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Dirk Eddelbuettel @eddelbuettel.com · 11/11/2025
duckdb-mlpack 0.0.4: Added random forest and logistic regression Bringing mlpack machine learning to duckdb SQL dirk.eddelbuettel.com/blog/2025/11... Adds random forest and logistic regression, reworks interface, adds new state variable for verbosity, expands documentation and adds unit tests
Screenshot of blog post at https://dirk.eddelbuettel.com/blog/2025/11/11#duckdb-mlpack_0.0.4 describing release 0.0.4 of the duckdb community extension mlpack.
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Python Software Foundation @python.org · 27/10/2025
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-... 🧵
python.org
The official home of the Python Programming Language
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Damian Carrington @dpcarrington.bsky.social · 15/10/2025
Record leap in CO2 fuels fears of accelerating global heating - CO2 in the air hit new high last year, with scientists concerned natural land and ocean carbon sinks are weakening @wmo-global.bsky.social #climatecrisis Story by me www.theguardian.com/environment/...
theguardian.com
Record leap in CO2 fuels fears of accelerating global heating
CO2 in air hit new high last year, with scientists concerned natural land and ocean carbon sinks are weakening
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Chelsea Parlett @chelseaparlett.bsky.social · 04/10/2025
It’s not the method that makes you causal it’s the assumptions
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Savannah Ostrowski @savannah.dev · 29/07/2025
First up in the "You don't have to be a compiler engineer" blog post series? A little blog post about how JIT builds of CPython actually work. 🖤 savannah.dev/posts/how-yo...
savannah.dev
How JIT builds of CPython actually work
You don't have to be a compiler engineer to understand how your code runs in a JIT build of CPython
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Bob Kopp @bobkopp.net · 05/09/2025
I had an engagement with blogger, failed California gubernatorial candidate, and self-identified reporter Michael Shellenberger this past week, which started out being about this new paper being heralded by climate skeptics as disproving global sea-level acceleration. (LONG 🧵)
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Dan Grey @dangrey.bsky.social · 20/08/2025
This article is catching eyes today so let me explain what it misses, no. 1 of which is COST 1/
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Paper Skygest Team @paper-feed.bsky.social · 19/08/2025
**Please repost** If you're enjoying Paper Skygest -- our personalized feed of academic content on Bluesky -- we'd appreciate you reposting this! We’ve found that the most effective way for us to reach new users and communities is through users sharing it with their network
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Armin Ronacher @mitsuhiko.at · 19/07/2025
How well do you know Python’s f-strings? I built a thing inspired by JavaScript’s Date constructor quiz but for Python. fstrings.wtf
fstrings.wtf
fstrings.wtf - Python F-String Quiz
Test your knowledge of Python's f-string formatting with this interactive quiz. How well do you know Python's string formatting quirks?
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kepano @stephango.com · 18/07/2025
No one knows how many users @obsidian.md has I think it's around 5-10 million people but I'm not sure? Anyone can download the app and start using it without creating an account or talking to anyone, and there are no analytics built-in 🤷‍♂️
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Costanza Tomaselli @costom.bsky.social · 18/07/2025
Hola - Estoy haciendo una encuesta sobre cómo se preparan las empresas mexicanas ante choques energéticos. Help me out - I’m running a survey on how Mexican firms prepare for energy shocks. Toma menos de 2 mins / Takes less than 2 mins: docs.google.com/forms/d/e/1F...
docs.google.com
Solicitud de colaboración para estudio sobre el impacto del aumento en los precios de energía
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Jake VanderPlas @jakevdp.bsky.social · 09/01/2025
I think my favorite line of Python code I've ever encountered is curry = partial(partial, partial) So simple, but also breaks your brain
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Global Energy Monitor @globalenergymon.bsky.social · 15/07/2025
📢 NEW Global Cement & Concrete Tracker ⤵️ 🌏 3,515 plants in 167 countries/areas 🏗️ 5.5B tonnes of cement capacity & 3.1B tonnes of clinker capacity 💰 2300+ cement asset owners 🔎 Includes info on emissions reduction tech Explore & download the data
globalenergymonitor.org
Global Cement and Concrete Tracker
The Global Cement and Concrete Tracker (GCCT) provides information on global integrated and grinding plants, including all plants that have been proposed or under construction since 2018 and retired…
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Christian Hammond @chipx86.com · 12/07/2025
How much do you know about #Python functions, their signatures, and their typing? Do you know how unbound vs. bound methods differ and how to tell them apart? Do you know how unbound methods become bound methods? Do you know how to type-annotate all this? chipx86.blog/2025/07/12/a... #blog #til
chipx86.blog
A crash course on Python function signatures and typing
More than you probably ever wanted to know about Python function signatures and typing shenanigans. And it’s just the start.
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 08/07/2025
This is good advice for working with Python dataclasses in particular when subclassing
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David Kleimann @davidkleimann.bsky.social · 05/07/2025
Since the ETS is not a tax but a regulation under EU law - and very likely found to be a regulation under WTO law, too - refunds of ETS charges upon export are prohibited export subsidies. Refunds of a carbon tax would be permissible, however 🙃. That rule needs an update, clearly. (2/2)
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Alex @s3alfisc.bsky.social · 06/07/2025
𝐏𝐲𝐅𝐢𝐱𝐞𝐬𝐭 0.30.1 is on 𝐏𝐲𝐏𝐢 and I am extremely happy with this release, mostly because of two 𝐧𝐞𝐰 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬: a Rust back end for all performance critical parts and quantile regression.
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Deutsche Umwelthilfe @umwelthilfe.bsky.social · 25/06/2025
Unsere Aufnahmen zeigen: An 17 von 26 Gasstandorten in Niedersachen treten hohe #Methan-Emissionen durch u.a. Leckagen aus. Das gefährdet unser Klima und die Gesundheit. Es braucht endlich eine strikte Umsetzung der EU-Methanverordnung – ohne Abstriche! www.duh.de/presse/press...
duh.de
DUH-Aufnahmen decken erhebliche Methan-Emissionen auf
• Aufnahmen der Deutschen Umwelthilfe und Clean Air Taskforce enthüllen regelmäßige und teils sehr hohe Methan-Emissionen an fossiler Gasinfrastruktur wie Produktionsstätten, Pipelines und Speichern• ...
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Francesca Cesari @francesari.bsky.social · 16/06/2025
Transparent peer review to be extended to all of Nature's research papers 🧪👇 www.nature.com/articles/d41...
nature.com
Transparent peer review to be extended to all of Nature’s research papers
From today, all new submissions to Nature that are published will be accompanied by referees’ reports and author responses — to illuminate the process of producing rigorous science.
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EAERE @eaere.bsky.social · 13/06/2025
📲 Do not forget to download the "Conference4me" app on your smartphone: you will be able to browse the programme and create your own agenda for the Conference.
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Sebastian Karcher @adam42smith.bsky.social · 09/06/2025
I don't know if bsky is a good platform for political debate. But as a replacement for academic twitter -- if the 10-skeet response to this by @dandekadt.bsky.social , complete with tables & maps, doesn't make your heart go pitter patter on a Monday morning, I don't know what will.
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apoorva lal @apoorvalal.com · 08/06/2025
Presenting an invitation to the open source python econometrics ecosystem with @s3alfisc.bsky.social on Thursday at a NABE webinar. Please come [and/or send us PRs!] They also have talks from @jondr44.bsky.social and @lihualei.bsky.social lined up for later in the summer nabe.com/NABE/Events/...
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Daniele Girardi @dgirardi.bsky.social · 06/06/2025
New updated slides deck about Local Projections Difference-in-Differences (LP-DiD) LP-DiD is a fast and simple to implement regression-based framework for estimating DiD, which can reproduce popular recent estimators as specific instances. danielegirardi.github.io/posts/docume...
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Financial Times @financialtimes.com · 02/06/2025
'Forever chemicals' are seeping into waterways across Europe. A vanishingly small, man-made molecule resists all attempts of removal. How will the EU eradicate the pollution? www.ft.com/content/a36c...
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Andrea Matranga @andreamatranga.bsky.social · 29/05/2025
The tragic landslide in Blatten gives me the excuse to tell you the story of how we found out Ice Ages existed. It's a cool story and the most important bit is rather similar to what's happening now.
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Tim Bresnahan @timobres.bsky.social · 18/05/2025
#econsky What do we know about “Artificial Intelligence, Scientific Discovery, and Product Innovation” and about MIT's investigation of this paper, which apparently led to expulsion of its author? And what should we change in response. /1
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Leonard Stimpfle @leonardstimpfle.eurosky.social · 23/04/2025
Very nice selection of modern Python features
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Alex @s3alfisc.bsky.social · 19/04/2025
PyFixest 0.29 is on PyPi! - We have updated how small sample adjustments are computed. PyFixest inference matches fixest now 100%, out of the box and all of the time! - We have added support for fully saturated event studies, which in turn enables @apoorvalal.com's DiD specification tests.
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